{"id":1772,"date":"2025-07-27T20:07:17","date_gmt":"2025-07-27T20:07:17","guid":{"rendered":"https:\/\/www.diecastingschina.com\/?p=1772"},"modified":"2025-07-27T20:07:21","modified_gmt":"2025-07-27T20:07:21","slug":"hustota-hliniku-a-slitin-hliniku","status":"publish","type":"post","link":"https:\/\/www.diecastingschina.com\/cs\/hustota-hliniku-a-slitin-hliniku\/","title":{"rendered":"Hustota hlin\u00edku a slitin hlin\u00edku: Hlin\u00edk a hlin\u00edk: komplexn\u00ed pr\u016fvodce"},"content":{"rendered":"<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXeJc0SKMqdwG6_p5_XVMKY4S_32GialEE_QJBdA5z7KnYKgkYU7IHxynfhRCghUU2WdQG3-qk0U95IJux9ILuZML03ziqhMud7xyjzJ1FL--mmLy0nQCuJjL4Wv3t_AxcGrR9Z3FGnGaPgUijyaY58?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hlin\u00edk je st\u0159\u00edb\u0159it\u011b b\u00edl\u00fd, m\u011bkk\u00fd kov s n\u00edzkou hustotou, kter\u00fd je jedn\u00edm z nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edch kov\u016f v zemsk\u00e9 k\u016f\u0159e a jeho \u00falohu v modern\u00edm pr\u016fmyslu nelze p\u0159ece\u0148ovat. N\u00edzk\u00e1 hustota je jednou z jeho nejcharakteristi\u010dt\u011bj\u0161\u00edch siln\u00fdch str\u00e1nek vedle dal\u0161\u00edch pozitivn\u00edch vlastnost\u00ed. Hmotnost materi\u00e1lu vyd\u011blen\u00e1 jeho objemem se naz\u00fdv\u00e1 hustota materi\u00e1lu, v p\u0159\u00edpad\u011b hlin\u00edku se m\u016f\u017ee pohybovat v rozmez\u00ed p\u0159ibli\u017en\u011b 2,70 g\/cm 3 nebo p\u0159ibli\u017en\u011b 1\/3 hustoty oceli \u010di m\u011bdi. Tato z\u00e1kladn\u00ed vlastnost zm\u011bnila pr\u016fmyslov\u00e1 odv\u011btv\u00ed, jako je leteck\u00fd, automobilov\u00fd a stavebn\u00ed pr\u016fmysl, kde je velk\u00fdm z\u00e1jmem sn\u00ed\u017eit hmotnost p\u0159i sou\u010dasn\u00e9m zachov\u00e1n\u00ed pevnosti.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u017eite\u010dnost hlin\u00edku se zvy\u0161uje, pokud je legov\u00e1n dal\u0161\u00edmi kovy, jako je ho\u0159\u010d\u00edk, k\u0159em\u00edk, m\u011b\u010f, zinek nebo mangan. Slitiny hlin\u00edku nejen\u017ee zachov\u00e1vaj\u00ed n\u00edzkou hustotu kovu, ale tak\u00e9 zlep\u0161uj\u00ed vlastnosti, jako je pevnost, odolnost proti korozi a tepeln\u00e1 vodivost, op\u011bt v z\u00e1vislosti na leguj\u00edc\u00edch prvc\u00edch a postupech zpracov\u00e1n\u00ed. Rozd\u00edl v hustot\u011b mezi hlin\u00edkov\u00fdmi slitinami nemus\u00ed b\u00fdt velk\u00fd a obvykle se pohybuje mezi 2,60 g\/cm 3 a 2,90 g\/cm 3, ale m\u016f\u017ee m\u00edt extr\u00e9mn\u011b velk\u00fd rozd\u00edl, pokud jde o vysoce p\u0159esn\u00e9 proveden\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Je nezbytn\u00e9, aby in\u017een\u00fd\u0159i, materi\u00e1lov\u00ed v\u011bdci, architekti a v\u00fdrobci rozum\u011bli hustot\u011b hlin\u00edku a slitin. P\u0159i v\u00fdvoji technick\u00e9ho n\u00e1vrhu optimalizovan\u00e9 sou\u010d\u00e1sti letadla, kter\u00e1 mus\u00ed m\u00edt minim\u00e1ln\u00ed hmotnost, nebo p\u0159i v\u00fdb\u011bru vhodn\u00e9ho materi\u00e1lu pro pou\u017eit\u00ed v n\u011bjak\u00e9m obalov\u00e9m materi\u00e1lu m\u016f\u017ee pochopen\u00ed toho, jak hustota souvis\u00ed s mechanick\u00fdmi a tepeln\u00fdmi vlastnostmi, poskytnout lidem lep\u0161\u00ed zp\u016fsob rozhodov\u00e1n\u00ed, kter\u00fd je efektivn\u011bj\u0161\u00ed. \u010cl\u00e1nek se hloub\u011bji zab\u00fdv\u00e1 v\u011bdeck\u00fdmi poznatky o hustot\u011b hlin\u00edku a jej\u00ed prom\u011bnlivosti v z\u00e1vislosti na legov\u00e1n\u00ed, pr\u016fmyslov\u00fdmi d\u016fsledky hustoty hlin\u00edku a jej\u00edm v\u00fdznamem pro udr\u017eitelnost navrhov\u00e1n\u00ed a inovac\u00ed obecn\u011b.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Co je to hustota?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hustota je jednou ze z\u00e1kladn\u00edch fyzik\u00e1ln\u00edch vlastnost\u00ed hmoty a hraje kl\u00ed\u010dovou roli v materi\u00e1lov\u00fdch v\u011bd\u00e1ch, fyzice a in\u017een\u00fdrstv\u00ed. V podstat\u011b je hustota definov\u00e1na jako mno\u017estv\u00ed hmoty obsa\u017een\u00e9 v jednotkov\u00e9m objemu l\u00e1tky. Tato vlastnost n\u00e1m umo\u017e\u0148uje porovn\u00e1vat, jak \"t\u011b\u017ek\u00e9\" jsou r\u016fzn\u00e9 materi\u00e1ly, i kdy\u017e zauj\u00edmaj\u00ed stejn\u00fd objem.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B\u011b\u017en\u00e9 jednotky hustoty<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Gramy na centimetr krychlov\u00fd (g\/cm\u00b3):<\/strong> b\u011b\u017en\u011b pou\u017e\u00edvan\u00e9 v laboratorn\u00edch a technick\u00fdch podm\u00ednk\u00e1ch<\/li>\n\n\n\n<li><strong>Kilogramy na metr krychlov\u00fd (kg\/m\u00b3):<\/strong> standardn\u00ed jednotka v SI (Mezin\u00e1rodn\u00ed soustava jednotek)<\/li>\n\n\n\n<li><strong>Libry na palec krychlov\u00fd (lb\/in\u00b3) nebo libry na stopu krychlovou (lb\/ft\u00b3):<\/strong> obvykle se pou\u017e\u00edv\u00e1 v imperi\u00e1ln\u00edch syst\u00e9mech, zejm\u00e9na v USA.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>V\u00fdznam hustoty v materi\u00e1lov\u00e9 v\u011bd\u011b<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXe00BLnVGHmhpy5aAmVt2WoX_p-ZTxXQZ66GDjsfA6femaygXmxQxPANPmkKJCbibE4YN_cY69Lty9013719W_E2nVvUVftQf3ir8JceqBE7vzVJssAuJUS3To2pbBVKUF_CsuElx71Tqs_IfbSnq8?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">V kontextu kov\u016f, jako je hlin\u00edk a jeho slitiny, je hustota v\u00edce ne\u017e jen \u010d\u00edslo - m\u00e1 p\u0159\u00edm\u00fd vliv:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hmotnost konstrukce:<\/strong> Materi\u00e1ly s ni\u017e\u0161\u00ed hustotou vedou k leh\u010d\u00edm konstrukc\u00edm, co\u017e je v leteck\u00e9m a automobilov\u00e9m pr\u016fmyslu velmi d\u016fle\u017eit\u00e9.<\/li>\n\n\n\n<li><strong>Efektivita dopravy:<\/strong> Sn\u00ed\u017een\u00ed hmotnosti sou\u010d\u00e1st\u00ed sni\u017euje spot\u0159ebu paliva a zvy\u0161uje energetickou \u00fa\u010dinnost.<\/li>\n\n\n\n<li><strong>Tepeln\u00fd v\u00fdkon:<\/strong> Materi\u00e1ly s r\u016fznou hustotou maj\u00ed r\u016fznou tepelnou kapacitu a tepelnou vodivost.<\/li>\n\n\n\n<li><strong>Manipulace s materi\u00e1lem a jeho zpracov\u00e1n\u00ed:<\/strong> Leh\u010d\u00ed materi\u00e1ly jsou \u010dasto jednodu\u0161\u0161\u00ed a levn\u011bj\u0161\u00ed na p\u0159epravu, manipulaci a v\u00fdrobu.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Relativn\u00ed srovn\u00e1n\u00ed<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pro pochopen\u00ed v\u00fdznamu hustoty porovnejte hlin\u00edk (cca 2,70 g\/cm\u00b3) s ocel\u00ed (cca 7,85 g\/cm\u00b3) nebo m\u011bd\u00ed (cca 8,96 g\/cm\u00b3). Hlin\u00edk nab\u00edz\u00ed t\u00e9m\u011b\u0159 t\u0159etinovou hmotnost t\u011bchto kov\u016f p\u0159i zachov\u00e1n\u00ed p\u0159im\u011b\u0159en\u00e9 mechanick\u00e9 pevnosti, co\u017e z n\u011bj \u010din\u00ed materi\u00e1l, kter\u00fd je vhodn\u00fd pro aplikace citliv\u00e9 na hmotnost.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Hustota jako n\u00e1vrhov\u00fd parametr<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In\u017een\u00fd\u0159i a projektanti mus\u00ed p\u0159i v\u00fdb\u011bru materi\u00e1l\u016f pro jak\u00fdkoli projekt pe\u010dliv\u011b zv\u00e1\u017eit hustotu. A\u0165 u\u017e se jedn\u00e1 o optimalizaci podvozku vysokorychlostn\u00edho vlaku nebo t\u011bla chytr\u00e9ho telefonu, je nezbytn\u00e9 vyv\u00e1\u017eit pom\u011br pevnosti a hmotnosti, n\u00e1klady, tepeln\u00e9 chov\u00e1n\u00ed a odolnost. Hustota se st\u00e1v\u00e1 kl\u00ed\u010dovou vlastnost\u00ed, kter\u00e1 tuto rovnov\u00e1hu ovliv\u0148uje, zejm\u00e9na p\u0159i navrhov\u00e1n\u00ed s ohledem na energetickou \u00fa\u010dinnost a udr\u017eitelnost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Hustota \u010dist\u00e9ho hlin\u00edku<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXd9SNnVSr01pPM5N-iKq1FOjXLMhbRFaOu3oBOBJbFqKeACCaFsmnC1XlwV7CKW7aR-1E78hliCii9vLDxjRAhm5Gj0YjPhEf1bS1ti_9_PYKXXc3hGQOAFB88fgyRsbH6mA2oi4c5F1wn_0qCjVQ?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hustota \u010dist\u00e9ho hlin\u00edku je 2,70 gramu na centimetr krychlov\u00fd (g\/cm 3 ) nebo 2 700 kilogram\u016f na metr krychlov\u00fd (kg\/m 3 ). Je to jeden z neodmysliteln\u00fdch faktor\u016f, kter\u00fd odli\u0161uje pou\u017eit\u00ed hlin\u00edku mezi v\u011bt\u0161inou ostatn\u00edch technick\u00fdch kov\u016f. Pro srovn\u00e1n\u00ed: hlin\u00edk m\u00e1 t\u00e9m\u011b\u0159 t\u0159etinovou hustotu oproti oceli (7,85 g\/cm 3 ) a mnohem men\u0161\u00ed ne\u017e m\u011b\u010f (8,96 g\/cm 3 ). Tato p\u0159irozen\u011b n\u00edzk\u00e1 hmotnost je jedn\u00edm z hlavn\u00edch faktor\u016f, kter\u00e9 vedly k aktivn\u00edmu pou\u017e\u00edv\u00e1n\u00ed hlin\u00edku ve v\u00fdrob\u00e1ch, kde je hmotnost hlavn\u00edm hlediskem, jako nap\u0159\u00edklad v leteck\u00e9m pr\u016fmyslu, doprav\u011b, stavebnictv\u00ed a spot\u0159ebn\u00ed elektronice.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Kl\u00ed\u010dov\u00e9 fyzik\u00e1ln\u00ed vlastnosti \u010dist\u00e9ho hlin\u00edku<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> 2,70 g\/cm\u00b3 (2,700 kg\/m\u00b3)<\/li>\n\n\n\n<li><strong>Bod t\u00e1n\u00ed:<\/strong> 660,3\u00b0C (1220,5\u00b0F)<\/li>\n\n\n\n<li><strong>Tepeln\u00e1 vodivost:<\/strong> P\u0159ibli\u017en\u011b 235 W\/m-K - co\u017e z n\u011bj \u010din\u00ed vynikaj\u00edc\u00ed vodi\u010d tepla.<\/li>\n\n\n\n<li><strong>Elektrick\u00e1 vodivost:<\/strong> Zhruba 61% vodivosti m\u011bdi, ale s mnohem men\u0161\u00ed hmotnost\u00ed.<\/li>\n\n\n\n<li><strong>Barva a vzhled:<\/strong> St\u0159\u00edb\u0159it\u011b b\u00edl\u00fd, leskl\u00fd povrch, kter\u00fd odol\u00e1v\u00e1 oxidaci.<\/li>\n\n\n\n<li><strong>Ta\u017enost a kujnost:<\/strong> \u010cist\u00fd hlin\u00edk je m\u011bkk\u00fd a lze jej snadno st\u00e1\u010det do dr\u00e1t\u016f nebo v\u00e1lcovat do tenk\u00fdch plech\u016f.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Pro\u010d je d\u016fle\u017eit\u00e1 n\u00edzk\u00e1 hustota<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00edzk\u00e1 hustota hlin\u00edku zaji\u0161\u0165uje vysok\u00fd pom\u011br pevnosti a hmotnosti, co\u017e je cenn\u00e1 vlastnost pro pr\u016fmyslov\u00e1 odv\u011btv\u00ed, jako je automobilov\u00fd a leteck\u00fd pr\u016fmysl, kde sn\u00ed\u017een\u00ed hmotnosti p\u0159\u00edmo zlep\u0161uje palivovou \u00fa\u010dinnost a v\u00fdkon. Lehk\u00e9 komponenty nav\u00edc usnad\u0148uj\u00ed manipulaci, p\u0159epravu a instalaci a jsou n\u00e1kladov\u011b efektivn\u011bj\u0161\u00ed ve stavebnictv\u00ed a v\u00fdrob\u011b.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Tabulka 1 Srovn\u00e1n\u00ed v\u00fdkonu<\/em><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Majetek<\/strong><\/td><td><strong>Hlin\u00edk<\/strong><\/td><td><strong>Ocel<\/strong><\/td><td><strong>M\u011b\u010f<\/strong><\/td><\/tr><tr><td>Hustota (g\/cm\u00b3)<\/td><td>2.70<\/td><td>7.85<\/td><td>8.96<\/td><\/tr><tr><td>Tepeln\u00e1 vodivost<\/td><td>Vysok\u00e1<\/td><td>St\u0159edn\u00ed<\/td><td>Velmi vysok\u00e1<\/td><\/tr><tr><td>Elektrick\u00e1 vodivost<\/td><td>St\u0159edn\u00ed (~61%)<\/td><td>N\u00edzk\u00e1<\/td><td>Velmi vysok\u00e1<\/td><\/tr><tr><td>Odolnost proti korozi<\/td><td>Vysok\u00e1<\/td><td>St\u0159edn\u00ed<\/td><td>N\u00edzk\u00e1<\/td><\/tr><tr><td>Recyklovatelnost<\/td><td>Vynikaj\u00edc\u00ed<\/td><td>Dobr\u00fd<\/td><td>Vynikaj\u00edc\u00ed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Aplikace \u010dist\u00e9ho hlin\u00edku<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u010cist\u00fd hlin\u00edk se sice kv\u016fli sv\u00e9 m\u011bkkosti pou\u017e\u00edv\u00e1 v konstruk\u010dn\u00edch aplikac\u00edch jen z\u0159\u00eddka, ale p\u0159esto je velmi cenn\u00fd v:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Elektrick\u00e9 vodi\u010de<\/strong> (nap\u0159. elektrick\u00e9 veden\u00ed)<\/li>\n\n\n\n<li><strong>V\u00fdm\u011bn\u00edky tepla<\/strong> a <strong>radi\u00e1tory<\/strong><\/li>\n\n\n\n<li><strong>Reflexn\u00ed povrchy<\/strong>, nap\u0159\u00edklad v oblasti osv\u011btlen\u00ed a izolace.<\/li>\n\n\n\n<li><strong>Balen\u00ed<\/strong>, v\u010detn\u011b plechovek od potravin a n\u00e1poj\u016f<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Omezen\u00ed \u010dist\u00e9ho hlin\u00edku<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Navzdory sv\u00fdm atraktivn\u00edm vlastnostem nen\u00ed \u010dist\u00fd hlin\u00edk ide\u00e1ln\u00ed pro ka\u017ed\u00fd p\u0159\u00edpad pou\u017eit\u00ed. Jeho relativn\u011b n\u00edzk\u00e1 pevnost v tahu a m\u011bkkost znamenaj\u00ed, \u017ee se p\u0159i nam\u00e1h\u00e1n\u00ed snadno deformuje. Pro n\u00e1ro\u010dn\u00e9 konstruk\u010dn\u00ed nebo mechanick\u00e9 aplikace se hlin\u00edk t\u00e9m\u011b\u0159 v\u017edy leguje dal\u0161\u00edmi prvky (nap\u0159. m\u011bd\u00ed, ho\u0159\u010d\u00edkem, k\u0159em\u00edkem nebo zinkem), aby se zlep\u0161ily jeho mechanick\u00e9 vlastnosti, tvrdost a odolnost.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u00daloha legov\u00e1n\u00ed<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Legov\u00e1n\u00edm se hlin\u00edk m\u011bn\u00ed z lehk\u00e9ho a tv\u00e1rn\u00e9ho kovu na v\u00fdkonn\u00fd konstruk\u010dn\u00ed materi\u00e1l. Tyto hlin\u00edkov\u00e9 slitiny lze p\u0159izp\u016fsobit konkr\u00e9tn\u00edm p\u0159\u00edpad\u016fm pou\u017eit\u00ed a v\u00fdrazn\u011b zv\u00fd\u0161it vlastnosti, jako je pevnost v tahu, odolnost proti \u00fanav\u011b a korozi, p\u0159i zachov\u00e1n\u00ed charakteristick\u00e9 lehkosti hlin\u00edku.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pro\u010d m\u00e1 legov\u00e1n\u00ed vliv na hustotu<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXck6UBsVINblnFhdTA6iVOaucFtgGeeuXa_Gn8z8iyGF50HkLKSqzbDGUu9DqIDky7tciw9VMqBA0AUK6m4SF6lu-5XHpdTyvzfDHRBKDYp-_NTFWB89ra2d7D8elvNQKVV3KqtXYrWyms02XyeslQ?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Legov\u00e1n\u00ed hlin\u00edku zahrnuje p\u0159id\u00e1v\u00e1n\u00ed dal\u0161\u00edch kovov\u00fdch nebo nekovov\u00fdch prvk\u016f za \u00fa\u010delem zlep\u0161en\u00ed specifick\u00fdch mechanick\u00fdch, tepeln\u00fdch nebo chemick\u00fdch vlastnost\u00ed. Tato vylep\u0161en\u00ed se \u010dasto zam\u011b\u0159uj\u00ed na pevnost, tvrdost, odolnost proti korozi nebo obrobitelnost, ale legov\u00e1n\u00ed nevyhnuteln\u011b ovliv\u0148uje tak\u00e9 jednu z\u00e1kladn\u00ed vlastnost: hustotu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Pochopen\u00ed vlivu leguj\u00edc\u00edch prvk\u016f<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hustota materi\u00e1lu je funkc\u00ed jeho <strong>atomov\u00e1 struktura<\/strong> a <strong>atomov\u00e1 hmotnost<\/strong>. Kdy\u017e se do hlin\u00edkov\u00e9 matrice zav\u00e1d\u011bj\u00ed leguj\u00edc\u00ed prvky, jejich atomov\u00e9 hmotnosti a zp\u016fsob, jak\u00fdm se integruj\u00ed s atomy hlin\u00edku, zp\u016fsobuj\u00ed m\u00edrn\u00e9 zm\u011bny v celkov\u00e9m pom\u011bru hmotnosti a objemu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pod\u00edvejte se na n\u011bkter\u00e9 b\u011b\u017en\u00e9 leguj\u00edc\u00ed prvky a jejich jednotliv\u00e9 hustoty:<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Tabulka 2 b\u011b\u017en\u00e9 leguj\u00edc\u00ed prvky a jejich jednotliv\u00e9 hustoty<\/em><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Leguj\u00edc\u00ed prvek<\/strong><\/td><td><strong>Chemick\u00fd symbol<\/strong><\/td><td><strong>P\u0159ibli\u017en\u00e1 hustota (g\/cm\u00b3)<\/strong><\/td><\/tr><tr><td>M\u011b\u010f<\/td><td>Cu<\/td><td>8.96<\/td><\/tr><tr><td>Zinek<\/td><td>Zn<\/td><td>7.14<\/td><\/tr><tr><td>Ho\u0159\u010d\u00edk<\/td><td>Mg<\/td><td>1.74<\/td><\/tr><tr><td>K\u0159em\u00edk<\/td><td>Si<\/td><td>2.33<\/td><\/tr><tr><td>Iron<\/td><td>Fe<\/td><td>7.87<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Obecn\u00fd trend: Jak prvky ovliv\u0148uj\u00ed hustotu hlin\u00edku<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>T\u011b\u017e\u0161\u00ed prvky (Cu, Zn, Fe):<\/strong> Tyto prvky maj\u00ed v\u00fdrazn\u011b vy\u0161\u0161\u00ed hustotu ne\u017e hlin\u00edk (2,70 g\/cm\u00b3). Po p\u0159id\u00e1n\u00ed do hlin\u00edku, a to i v mal\u00fdch procentech, zvy\u0161uj\u00ed celkovou hustotu slitiny.<\/li>\n\n\n\n<li><strong>Leh\u010d\u00ed prvky (Mg, Si):<\/strong> Ho\u0159\u010d\u00edk a k\u0159em\u00edk jsou leh\u010d\u00ed ne\u017e hlin\u00edk. Jejich p\u0159id\u00e1n\u00ed m\u00e1 obvykle neutr\u00e1ln\u00ed nebo m\u00edrn\u011b sni\u017euj\u00edc\u00ed \u00fa\u010dinek na kone\u010dnou hustotu.<\/li>\n\n\n\n<li><strong>Kombinovan\u00e9 \u00fa\u010dinky:<\/strong> I p\u0159es p\u0159id\u00e1n\u00ed hust\u0161\u00edch nebo leh\u010d\u00edch prvk\u016f z\u016fst\u00e1v\u00e1 z\u00e1kladn\u00edm materi\u00e1lem hlin\u00edk. Proto jsou zm\u011bny hustoty zp\u016fsoben\u00e9 legov\u00e1n\u00edm obecn\u011b m\u00edrn\u00e9 - obvykle v rozmez\u00ed \u00b15%.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Tabulka 3 Jak legov\u00e1n\u00ed m\u011bn\u00ed hustotu<\/em><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>S\u00e9rie Alloy<\/strong><\/td><td><strong>Hlavn\u00ed leguj\u00edc\u00ed prvky<\/strong><\/td><td><strong>P\u0159ibli\u017en\u00e1 hustota (g\/cm\u00b3)<\/strong><\/td><td><strong>Pozn\u00e1mky<\/strong><\/td><\/tr><tr><td>1xxx<\/td><td>\u010cist\u00fd hlin\u00edk (&gt;99%)<\/td><td>2.70<\/td><td>Vynikaj\u00edc\u00ed vodivost, velmi m\u011bkk\u00fd<\/td><\/tr><tr><td>2xxx<\/td><td>M\u011b\u010f<\/td><td>2.78 - 2.85<\/td><td>Vysok\u00e1 pevnost, ni\u017e\u0161\u00ed odolnost proti korozi<\/td><\/tr><tr><td>5xxx<\/td><td>Ho\u0159\u010d\u00edk<\/td><td>2.64 - 2.68<\/td><td>Dobr\u00e1 sva\u0159itelnost a odolnost proti korozi<\/td><\/tr><tr><td>6xxx<\/td><td>Ho\u0159\u010d\u00edk, k\u0159em\u00edk<\/td><td>2.68 - 2.75<\/td><td>Univerz\u00e1ln\u00ed, b\u011b\u017en\u011b pou\u017e\u00edvan\u00e9 ve stavebnictv\u00ed<\/td><\/tr><tr><td>7xxx<\/td><td>Zinek, ho\u0159\u010d\u00edk<\/td><td>2.80 - 2.85<\/td><td>Velmi vysok\u00e1 pevnost, pou\u017e\u00edv\u00e1 se v letectv\u00ed a kosmonautice<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tyto odchylky se mohou zd\u00e1t \u010d\u00edseln\u011b mal\u00e9, ale v odv\u011btv\u00edch citliv\u00fdch na hmotnost, jako je automobilov\u00fd, leteck\u00fd a obalov\u00fd pr\u016fmysl, mohou i mal\u00e9 zm\u011bny hustoty ovlivnit \u00fa\u010dinnost paliva, nosnost a n\u00e1kladovou efektivitu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Praktick\u00e9 d\u016fsledky legov\u00e1n\u00ed na hustotu<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Letectv\u00ed a kosmonautika:<\/strong> Hust\u0161\u00ed a pevn\u011bj\u0161\u00ed hlin\u00edkov\u00e1 slitina m\u016f\u017ee b\u00fdt p\u0159esto vhodn\u011bj\u0161\u00ed, pokud umo\u017e\u0148uje pou\u017e\u00edt ten\u010d\u00ed nebo men\u0161\u00ed po\u010det sou\u010d\u00e1st\u00ed, ani\u017e by byla ohro\u017eena bezpe\u010dnost.<\/li>\n\n\n\n<li><strong>Automobilov\u00fd pr\u016fmysl:<\/strong> Lehk\u00e9 slitiny zlep\u0161uj\u00ed spot\u0159ebu paliva bez sn\u00ed\u017een\u00ed v\u00fdkonu.<\/li>\n\n\n\n<li><strong>Balen\u00ed:<\/strong> Drobn\u00e9 zm\u011bny hustoty mohou v\u00fdznamn\u011b ovlivnit n\u00e1klady na p\u0159epravu velk\u00fdch objem\u016f hlin\u00edkov\u00fdch plechovek nebo f\u00f3li\u00ed.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Legov\u00e1n\u00ed hlin\u00edku je nezbytn\u00e9 pro p\u0159izp\u016fsoben\u00ed jeho vlastnost\u00ed specifick\u00fdm pot\u0159eb\u00e1m pr\u016fmyslu. P\u0159esto\u017ee zm\u011bny hustoty jsou obvykle mal\u00e9, jejich pochopen\u00ed umo\u017e\u0148uje konstrukt\u00e9r\u016fm a v\u00fdrobc\u016fm naj\u00edt spr\u00e1vnou rovnov\u00e1hu mezi mechanick\u00fdmi vlastnostmi a \u00fa\u010dinnost\u00ed materi\u00e1lu. V\u00fdb\u011br spr\u00e1vn\u00e9 slitiny zahrnuje v\u00edce ne\u017e jen pevnost - zohled\u0148uje tak\u00e9 to, jak i zlomkov\u00e9 zm\u011bny hustoty ovliv\u0148uj\u00ed celkovou konstrukci a funk\u010dnost syst\u00e9mu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Typick\u00e9 hodnoty hustoty hlin\u00edkov\u00fdch slitin<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXfFyz_NcSSn1iTBgOBrj5DVVLrnA554ciQwbdBeCO1PYty_AS6KOhktKGWDK1wpLCLpmqlAncDILJiTQUG9ZVYCmrEkwc-iBRtrVNx0ApbsYJTWL6TWmLmBh47S6BUOGiA1DgXpxVEozxvHCpxFpuo?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">V\u011bt\u0161ina hlin\u00edkov\u00fdch slitin se pohybuje v rozmez\u00ed 2,64 a\u017e 2,83 g\/cm\u00b3. Konkr\u00e9tn\u00ed hodnota z\u00e1vis\u00ed na leguj\u00edc\u00edch prvc\u00edch a jejich koncentraci.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prozkoumejme hustoty hlin\u00edkov\u00fdch slitin podle s\u00e9ri\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Hustota podle \u0159ady hlin\u00edku (1xxx a\u017e 7xxx)<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0158ada 1xxx (\u010dist\u00fd hlin\u00edk)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> ~2,705 g\/cm\u00b3<\/li>\n\n\n\n<li>Vysok\u00e1 \u010distota (\u226599,3% Al)<\/li>\n\n\n\n<li>Aplikace: Elektrick\u00e9 vodi\u010de, obaly na potraviny<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0158ada 2xxx (slitiny hlin\u00edku a m\u011bdi)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> ~2,78 a\u017e 2,82 g\/cm\u00b3<\/li>\n\n\n\n<li>Vysok\u00e1 pevnost, n\u00edzk\u00e1 odolnost proti korozi<\/li>\n\n\n\n<li>Aplikace: Leteck\u00e9 konstrukce, automobilov\u00fd pr\u016fmysl<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0158ada 3xxx (hlin\u00edk-mangan)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> ~2,72 a\u017e 2,74 g\/cm\u00b3<\/li>\n\n\n\n<li>Dobr\u00e1 odolnost proti korozi<\/li>\n\n\n\n<li>Aplikace: St\u0159e\u0161n\u00ed krytiny, obklady, kuchy\u0148sk\u00e9 n\u00e1\u010din\u00ed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0158ada 4xxx (hlin\u00edk-k\u0159em\u00edk)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> ~2,70 a\u017e 2,75 g\/cm\u00b3<\/li>\n\n\n\n<li>Zv\u00fd\u0161en\u00e1 odolnost proti opot\u0159eben\u00ed a korozi<\/li>\n\n\n\n<li>Aplikace: D\u00edly automobilov\u00fdch motor\u016f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0158ada 5xxx (hlin\u00edk-ho\u0159\u010d\u00edk)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> ~2,66 a\u017e 2,69 g\/cm\u00b3<\/li>\n\n\n\n<li>Vynikaj\u00edc\u00ed odolnost proti korozi<\/li>\n\n\n\n<li>Aplikace: N\u00e1mo\u0159n\u00ed konstrukce, palivov\u00e9 n\u00e1dr\u017ee<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0158ada 6xxx (hlin\u00edk-ho\u0159\u010d\u00edk-k\u0159em\u00edk)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> ~2,69 a\u017e 2,70 g\/cm\u00b3<\/li>\n\n\n\n<li>V\u0161estrann\u00fd, tepeln\u011b zpracovateln\u00fd<\/li>\n\n\n\n<li>Aplikace: Stavebn\u00ed, architektonick\u00e9<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0158ada 7xxx (hlin\u00edk-zinek)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hustota:<\/strong> ~2,78 a\u017e 2,83 g\/cm\u00b3<\/li>\n\n\n\n<li>Velmi vysok\u00e1 pevnost<\/li>\n\n\n\n<li>Aplikace: Letectv\u00ed a kosmonautika, vysoce v\u00fdkonn\u00e9 sportovn\u00ed vybaven\u00ed<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Faktory ovliv\u0148uj\u00edc\u00ed hustotu hlin\u00edkov\u00fdch slitin<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A\u010dkoli hustota hlin\u00edkov\u00fdch slitin z\u016fst\u00e1v\u00e1 relativn\u011b stabiln\u00ed, n\u011bkolik faktor\u016f zpracov\u00e1n\u00ed a slo\u017een\u00ed m\u016f\u017ee zp\u016fsobit drobn\u00e9, ale d\u016fle\u017eit\u00e9 odchylky. Pochopen\u00ed t\u011bchto faktor\u016f je nezbytn\u00e9 pro in\u017een\u00fdry a konstrukt\u00e9ry pracuj\u00edc\u00ed v p\u0159esn\u00fdch aplikac\u00edch, jako je letectv\u00ed, automobilov\u00fd pr\u016fmysl nebo elektronika.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Tepeln\u00e9 zpracov\u00e1n\u00ed<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vlivem proces\u016f tepeln\u00e9ho zpracov\u00e1n\u00ed, jako je \u017e\u00edh\u00e1n\u00ed, zpracov\u00e1n\u00ed roztokem nebo st\u00e1rnut\u00ed, se m\u011bn\u00ed mikrostruktura hlin\u00edkov\u00fdch slitin. O\u0161et\u0159en\u00ed m\u011bn\u00ed rozm\u00edst\u011bn\u00ed atom\u016f a precipit\u00e1t\u016f ve slitin\u011b, co\u017e m\u016f\u017ee p\u0159in\u00e9st drobn\u00e9 zm\u011bny v uspo\u0159\u00e1d\u00e1n\u00ed atom\u016f, a t\u00edm i v hustot\u011b. Tyto posuny jsou obvykle mal\u00e9, ale mohou m\u00edt vliv na mechanick\u00e9 vlastnosti a v\u00fdpo\u010dty hmotnosti rozhoduj\u00edc\u00edch d\u00edl\u016f.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Zpracov\u00e1n\u00ed za studena<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159i ta\u017een\u00ed, v\u00e1lcov\u00e1n\u00ed nebo vytla\u010dov\u00e1n\u00ed doch\u00e1z\u00ed k mechanick\u00e9 deformaci materi\u00e1lu a zrna v hlin\u00edku se prodlou\u017e\u00ed a vyrovnaj\u00ed. T\u00edm se struktura krystal\u016f trochu smr\u0161t\u00ed, co\u017e m\u016f\u017ee v\u00e9st k jej\u00edmu lok\u00e1ln\u00edmu zhu\u0161t\u011bn\u00ed. \u010cist\u00fd vliv na objemovou hustotu je v\u0161ak mal\u00fd, ale u vysoce konstruk\u010dn\u00edch stroj\u016f v\u00fdznamn\u00fd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. Stopov\u00e9 prvky a imunita<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dokonce i drobn\u00e9 stopy n\u00e1hodn\u00fdch nebo zbytkov\u00fdch p\u0159\u00edsad, jako je olovo, vizmut nebo c\u00edn, mohou ovlivnit kone\u010dnou hustotu slitiny. Tyto ne\u010distoty nemus\u00ed p\u0159edstavovat z\u00e1va\u017en\u00e9 zm\u011bny mechanick\u00fdch vlastnost\u00ed, ale mohou naru\u0161it elektrickou vodivost, tepeln\u00e9 chov\u00e1n\u00ed a v\u00fdpo\u010dty hmotnosti t\u011bchto materi\u00e1l\u016f, zejm\u00e9na v kritick\u00fdch aplikac\u00edch.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. Zp\u016fsob v\u00fdroby: V\u00e1lcov\u00e1n\u00ed vs. odl\u00e9v\u00e1n\u00ed<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slitiny hlin\u00edku mohou b\u00fdt mikropor\u00e9zn\u00ed, maj\u00ed mikrop\u00f3ry (mal\u00e9 vzduchov\u00e9 kapsy, kter\u00e9 vznikaj\u00ed p\u0159i tuhnut\u00ed), co\u017e sni\u017euje jejich efektivn\u00ed hustotu.<\/li>\n\n\n\n<li>Oproti tomu kovan\u00e9 (v\u00e1lcovan\u00e9 nebo vytla\u010dovan\u00e9) hlin\u00edkov\u00e9 v\u00fdrobky jsou obecn\u011b hust\u0161\u00ed a homogenn\u011bj\u0161\u00ed, proto\u017ee tyto procesy vypl\u0148uj\u00ed v\u0161echny dutiny a stla\u010duj\u00ed obrobek dohromady.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Hustota vs. pevnost: Hustota: rovnov\u00e1ha ve stroj\u00edrenstv\u00ed<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXfUnY-x4Mwy0qwVY03-TiUy0NaqII5JLCwVBO-mmaIBQz5ZX8ioBbi9XlycqxFz_bHq24op86Tsxop3qhK0in8I9sUDim9yAqdYY2afYXJkdeNqpzLJ0o-ZTW5W83tdBCI19WcxxDq7eAHotEXM2XY?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jednou z nejcenn\u011bj\u0161\u00edch vlastnost\u00ed hlin\u00edku a jeho slitin je v\u00fdjime\u010dn\u00fd pom\u011br pevnosti a hmotnosti. Tento pom\u011br m\u00e1 z\u00e1sadn\u00ed v\u00fdznam pro modern\u00ed konstrukci, zejm\u00e9na v odv\u011btv\u00edch, kde je sn\u00ed\u017een\u00ed hmotnosti bez ob\u011btov\u00e1n\u00ed struktur\u00e1ln\u00ed integrity kritick\u00e9 - nap\u0159\u00edklad v leteck\u00e9m, automobilov\u00e9m, vojensk\u00e9m a vysoce v\u00fdkonn\u00e9m sportovn\u00edm vybaven\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Porozum\u011bn\u00ed specifick\u00e9 s\u00edle<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pro kvantifikaci \u00fa\u010dinnosti materi\u00e1lu p\u0159i kombinaci pevnosti a n\u00edzk\u00e9 hmotnosti pou\u017e\u00edvaj\u00ed in\u017een\u00fd\u0159i pojem m\u011brn\u00e1 pevnost:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Pro\u010d na tom z\u00e1le\u017e\u00ed<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nap\u0159\u00edklad ocel m\u00e1 sice vy\u0161\u0161\u00ed absolutn\u00ed pevnost ne\u017e hlin\u00edk, ale jej\u00ed hustota je t\u00e9m\u011b\u0159 t\u0159ikr\u00e1t vy\u0161\u0161\u00ed (p\u0159ibli\u017en\u011b 7,85 g\/cm\u00b3 oproti 2,70 g\/cm\u00b3 u hlin\u00edku). V d\u016fsledku toho mnoho hlin\u00edkov\u00fdch slitin p\u0159ekon\u00e1v\u00e1 ocel v m\u011brn\u00e9 pevnosti, co\u017e je ide\u00e1ln\u00ed pro konstruk\u010dn\u00ed sou\u010d\u00e1sti letadel, satelit\u016f a kosmick\u00fdch lod\u00ed, kde se \u00faspora hmotnosti p\u0159\u00edmo prom\u00edt\u00e1 do \u00faspory paliva, nosnosti a v\u00fdkonu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Slitiny s vysokou specifickou pevnost\u00ed<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V t\u00e9to souvislosti stoj\u00ed za zm\u00ednku zejm\u00e9na dv\u011b hlin\u00edkov\u00e9 slitiny:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Slitina hlin\u00edku 7075<\/strong>\n<ul class=\"wp-block-list\">\n<li>Vysok\u00e1 pevnost (srovnateln\u00e1 s n\u011bkter\u00fdmi ocelemi)<\/li>\n\n\n\n<li>Pou\u017e\u00edv\u00e1 se v konstrukc\u00edch letadel, r\u00e1m\u016f j\u00edzdn\u00edch kol a v leteck\u00e9m pr\u016fmyslu.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Slitina hlin\u00edku 2024<\/strong>\n<ul class=\"wp-block-list\">\n<li>Vynikaj\u00edc\u00ed odolnost proti \u00fanav\u011b<\/li>\n\n\n\n<li>\u0160irok\u00e9 pou\u017eit\u00ed v trupov\u00fdch a k\u0159\u00eddeln\u00edch konstrukc\u00edch<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Navzdory relativn\u011b n\u00edzk\u00e9 hustot\u011b maj\u00ed tyto slitiny pozoruhodnou pevnost, a proto jsou d\u016fle\u017eit\u00e9 pro konstrukce, kde z\u00e1le\u017e\u00ed na ka\u017ed\u00e9m gramu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Kompromisy a \u00favahy<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vy\u0161\u0161\u00ed pevnost obvykle znamen\u00e1 v\u011bt\u0161\u00ed legov\u00e1n\u00ed (nap\u0159. p\u0159id\u00e1n\u00ed m\u011bdi, zinku nebo ho\u0159\u010d\u00edku), co\u017e m\u016f\u017ee sn\u00ed\u017eit odolnost proti korozi nebo zkomplikovat v\u00fdrobu. Konstrukt\u00e9\u0159i mus\u00ed v\u017edy vyva\u017eovat:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u00edla<\/li>\n\n\n\n<li>Hustota<\/li>\n\n\n\n<li>Odolnost proti korozi<\/li>\n\n\n\n<li>N\u00e1klady<\/li>\n\n\n\n<li>Vyrobitelnost<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tato rovnov\u00e1ha je z\u00e1kladem v\u00fdb\u011bru materi\u00e1l\u016f ve stroj\u00edrenstv\u00ed a stavebnictv\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Hustota lit\u00fdch a tepan\u00fdch slitin<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXfXhoiW7aIqz7iIgOZN1A2IFH2IATazNmCswW9KxKrw5YY_CAp86VwtLRwQu8YmlmlL1iM_GZII7nc3WTpWSn2rFJ44PrOCzAQMfYfsHc67gizq3w1ou0BrNd08U_v3gylNJbiKrQMvnKduCayISwI?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Zp\u016fsob zpracov\u00e1n\u00ed hlin\u00edkov\u00fdch slitin - odl\u00e9v\u00e1n\u00ed nebo tv\u00e1\u0159en\u00ed (v\u00e1lcov\u00e1n\u00ed, vytla\u010dov\u00e1n\u00ed, kov\u00e1n\u00ed) - m\u00e1 m\u011b\u0159iteln\u00fd vliv na jejich hustotu. Tyto rozd\u00edly vypl\u00fdvaj\u00ed p\u0159edev\u0161\u00edm z rozd\u00edl\u016f v p\u00f3rovitosti, struktu\u0159e zrn a slo\u017een\u00ed slitiny.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Slitiny lit\u00e9ho hlin\u00edku<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Odl\u00e9van\u00e9 slitiny se vyr\u00e1b\u011bj\u00ed lit\u00edm roztaven\u00e9ho hlin\u00edku do forem. Texatanty, jako je k\u0159em\u00edk (Si), se p\u0159id\u00e1vaj\u00ed ve velk\u00e9m mno\u017estv\u00ed, aby kone\u010dn\u00fd produkt l\u00e9pe tekl a vyplnil formu. A\u010dkoli tyto p\u0159\u00eddavky zvy\u0161uj\u00ed odl\u00e9vatelnost, maj\u00ed tendenci vn\u00e1\u0161et do materi\u00e1l\u016f mikropor\u00e9znosti, tj. miniaturn\u00ed otvory se vzduchem. V d\u016fsledku toho maj\u00ed odl\u00e9van\u00e9 slitiny obvykle nepatrn\u011b ni\u017e\u0161\u00ed hustotu ve srovn\u00e1n\u00ed s jejich prot\u011bj\u0161kem v tv\u00e1\u0159en\u00e9m stavu.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Vy\u0161\u0161\u00ed obsah k\u0159em\u00edku<\/strong><\/li>\n\n\n\n<li><strong>V\u011bt\u0161\u00ed p\u00f3rovitost<\/strong> z chlazen\u00ed a tuhnut\u00ed<\/li>\n\n\n\n<li><strong>Typick\u00e1 hustota<\/strong>: ~2,66-2,68 g\/cm\u00b3<\/li>\n\n\n\n<li><strong>P\u0159\u00edklad<\/strong>: <em>Hlin\u00edkov\u00e1 slitina A356<\/em> - p\u0159ibli\u017en\u011b 2,67 g\/cm\u00b3<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Kovan\u00e9 slitiny hlin\u00edku<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Oproti tomu se tv\u00e1\u0159en\u00e9 slitiny zpracov\u00e1vaj\u00ed mechanicky, tj. v\u00e1lcov\u00e1n\u00edm, protla\u010dov\u00e1n\u00edm nebo kov\u00e1n\u00edm. Zrna kovu se p\u0159i t\u011bchto procesech stla\u010duj\u00ed a vyrovn\u00e1vaj\u00ed, \u010d\u00edm\u017e se zmen\u0161uj\u00ed mezery a zvy\u0161uje se struktur\u00e1ln\u00ed integrita. Vznik\u00e1 tak kondenzovan\u00fd, t\u00e9m\u011b\u0159 homogenn\u00ed materi\u00e1l s m\u00edrn\u011b vy\u0161\u0161\u00ed celkovou hustotou.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pevn\u011bj\u0161\u00ed struktura zrna<\/strong><\/li>\n\n\n\n<li><strong>Ni\u017e\u0161\u00ed p\u00f3rovitost<\/strong><\/li>\n\n\n\n<li><strong>Typick\u00e1 hustota<\/strong>: ~2,70 g\/cm\u00b3<\/li>\n\n\n\n<li><strong>P\u0159\u00edklad<\/strong>: <em>Slitina hlin\u00edku 6061<\/em> - p\u0159ibli\u017en\u011b 2,70 g\/cm\u00b3<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Kl\u00ed\u010dov\u00e9 poznatky<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Rozd\u00edl v hustot\u011b mezi lit\u00fdmi a tepan\u00fdmi hlin\u00edkov\u00fdmi slitinami je sice relativn\u011b mal\u00fd (\u010dasto men\u0161\u00ed ne\u017e 1,5%), ale m\u016f\u017ee m\u00edt d\u016fle\u017eit\u00e9 d\u016fsledky v aplikac\u00edch, kde je rozhoduj\u00edc\u00ed p\u0159esnost, pevnost a optimalizace hmotnosti.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Techniky m\u011b\u0159en\u00ed hustoty<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hustota je d\u016fle\u017eit\u00fdm parametrem p\u0159i zaji\u0161\u0165ov\u00e1n\u00ed kvality, v\u00fdzkumu materi\u00e1l\u016f a technick\u00e9m navrhov\u00e1n\u00ed a jej\u00ed p\u0159esn\u00e9 m\u011b\u0159en\u00ed je nezbytn\u00e9. Existuje \u0159ada technik, kter\u00e9 lze pou\u017e\u00edt v z\u00e1vislosti na typu materi\u00e1lu, tvaru a pot\u0159ebn\u00e9 p\u0159esnosti.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Archim\u00e9d\u016fv princip<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Jedn\u00e1 se o nej\u010dast\u011bj\u0161\u00ed <a href=\"https:\/\/www.thediecasting.com\/services\/aluminium-die-casting\/\" target=\"_blank\" rel=\"noopener\">hlin\u00edk<\/a> metoda slitin kov\u016f.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Princip fungov\u00e1n\u00ed:<\/strong> Hmotnost p\u0159edm\u011btu se m\u011b\u0159\u00ed ve vzduchu a hmotnost p\u0159edm\u011btu ve vod\u011b. Tento rozd\u00edl hmotnost\u00ed umo\u017e\u0148uje po zji\u0161t\u011bn\u00ed vytla\u010den\u00e9ho objemu vypo\u010d\u00edtat hustotu l\u00e1tky.<\/li>\n\n\n\n<li><strong>Ide\u00e1ln\u00ed pro<\/strong>: Pevn\u00e9 kovy pravideln\u00fdch tvar\u016f.<\/li>\n\n\n\n<li><strong>Klady<\/strong>: Jednoduch\u00e9, cenov\u011b v\u00fdhodn\u00e9 a spolehliv\u00e9.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Hydrostatick\u00e9 v\u00e1\u017een\u00ed<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Roz\u0161\u00ed\u0159en\u00ed Archim\u00e9dovy metody, kter\u00e9 se \u010dast\u011bji pou\u017e\u00edv\u00e1 u geometrick\u00fdch tvar\u016f nepravideln\u00e9 povahy.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Jak to funguje<\/strong>: Materi\u00e1l se pono\u0159\u00ed do kapaliny o zn\u00e1m\u00e9 hustot\u011b. Zm\u011b\u0159\u00ed se vztlakov\u00e1 s\u00edla, co\u017e umo\u017en\u00ed v\u00fdpo\u010det objemu.<\/li>\n\n\n\n<li><strong>Ide\u00e1ln\u00ed pro<\/strong>: Mal\u00e9 nebo por\u00e9zn\u00ed vzorky.<\/li>\n\n\n\n<li><strong>Klady<\/strong>: Vhodn\u00e9 pro jemn\u00e1 m\u011b\u0159en\u00ed nebo nepevn\u00e9 materi\u00e1ly.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. Rentgenov\u00e1 po\u010d\u00edta\u010dov\u00e1 tomografie (CT)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pokro\u010dil\u00e1 technologie pro slo\u017eit\u00fd tvar nebo tvar uvnit\u0159.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Princip, kter\u00fd za t\u00edm stoj\u00ed:<\/strong> Rentgenov\u00e9 sn\u00edmky reprodukuj\u00ed 3D konstrukci vzorku a odhaluj\u00ed vnit\u0159n\u00ed otvory nebo nesrovnalosti.<\/li>\n\n\n\n<li><strong>Ide\u00e1ln\u00ed pro<\/strong>: Kompozitn\u00ed materi\u00e1ly nebo sou\u010d\u00e1sti pro letectv\u00ed a kosmonautiku.<\/li>\n\n\n\n<li><strong>Klady<\/strong>: Nedestruktivn\u00ed, vysoce p\u0159esn\u00fd, detekuje mikropor\u00e9znost.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. Matematick\u00fd odhad<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pou\u017e\u00edv\u00e1 se, pokud nen\u00ed mo\u017en\u00e9 p\u0159\u00edm\u00e9 m\u011b\u0159en\u00ed.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Jak to funguje<\/strong>: Hustota se vypo\u010d\u00edt\u00e1 pomoc\u00ed v\u00e1\u017een\u00e9ho pr\u016fm\u011bru hustot jednotliv\u00fdch prvk\u016f ve zn\u00e1m\u00e9m slo\u017een\u00ed slitiny.<\/li>\n\n\n\n<li><strong>Ide\u00e1ln\u00ed pro<\/strong>: F\u00e1ze n\u00e1vrhu nebo digit\u00e1ln\u00ed simulace.<\/li>\n\n\n\n<li><strong>Klady<\/strong>: Rychl\u00e9 a teoretick\u00e9; nen\u00ed nutn\u00e9 prov\u00e1d\u011bt fyzick\u00e9 testov\u00e1n\u00ed.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Srovn\u00e1n\u00ed hustoty: Hlin\u00edk vs. ostatn\u00ed kovy<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Materi\u00e1l<\/strong><\/td><td><strong>Hustota (g\/cm\u00b3)<\/strong><\/td><\/tr><tr><td>Hlin\u00edk<\/td><td>2.70<\/td><\/tr><tr><td>Ho\u0159\u010d\u00edk<\/td><td>1.74<\/td><\/tr><tr><td>Titan<\/td><td>4.50<\/td><\/tr><tr><td>\u017delezo\/ocel<\/td><td>7.85<\/td><\/tr><tr><td>M\u011b\u010f<\/td><td>8.96<\/td><\/tr><tr><td>Olovo<\/td><td>11.34<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hlin\u00edk je mezi b\u011b\u017en\u00fdmi konstruk\u010dn\u00edmi kovy na druh\u00e9m m\u00edst\u011b po ho\u0159\u010d\u00edku, pokud jde o n\u00edzkou hustotu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u00daloha hustoty v aplikac\u00edch<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXfniqsNj4CimkILufJpJRqPfF_HqKyB2R38Bl4frfwCPNtPd7L0yqdX_klniP2KDk_V_3FEIFCWNOn62kK-h-bvjDAQwR1N27Zy15dVJViGQZf66HtOdrPFRKC8aZjOxR1OgPggWlzZEqYDmNlatMc?key=b83lr87RaSxWu3A4RsE3cA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Letectv\u00ed a kosmonautika<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slitiny jako 7075 a 2024 maj\u00ed vysokou m\u011brnou pevnost.<\/li>\n\n\n\n<li>N\u00edzk\u00e1 hustota umo\u017e\u0148uje zv\u00fd\u0161it \u00fa\u010dinnost paliva.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Automobilov\u00fd pr\u016fmysl<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pou\u017eit\u00ed \u0159ad 5xxx a 6xxx sni\u017euje hmotnost vozidla.<\/li>\n\n\n\n<li>Zlep\u0161uje spot\u0159ebu paliva a dodr\u017eov\u00e1n\u00ed emisn\u00edch p\u0159edpis\u016f.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Stavebnictv\u00ed<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Konstruk\u010dn\u00ed hlin\u00edkov\u00e9 profily z materi\u00e1l\u016f 6063 a 6061.<\/li>\n\n\n\n<li>N\u00edzk\u00e1 hmotnost sni\u017euje zat\u00ed\u017een\u00ed konstrukce a n\u00e1klady na p\u0159epravu.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Spot\u0159ebn\u00ed zbo\u017e\u00ed<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V notebooc\u00edch, telefonech a kuchy\u0148sk\u00e9m n\u00e1dob\u00ed se \u010dasto pou\u017e\u00edv\u00e1 \u0159ada 3xxx nebo 6xxx.<\/li>\n\n\n\n<li>Lehk\u00e9 a odoln\u00e9.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Balen\u00ed<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u010cist\u00fd hlin\u00edk nebo \u0159ada 1xxx pou\u017e\u00edvan\u00e1 pro plechovky a f\u00f3lie.<\/li>\n\n\n\n<li>Extr\u00e9mn\u011b lehk\u00e9, recyklovateln\u00e9.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Praktick\u00e9 p\u0159\u00edklady v\u00fdpo\u010dt\u016f hustoty<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P\u0159\u00edklad 1: Hmotnost hlin\u00edkov\u00e9 desky<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Objem = 1 m x 1 m x 0,01 m = 0,01 m\u00b3<\/li>\n\n\n\n<li>Hustota = 2 700 kg\/m\u00b3<\/li>\n\n\n\n<li><strong>Hmotnost = 2 700 \u00d7 0,01 = 27 kg<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>P\u0159\u00edklad 2: Srovn\u00e1n\u00ed hlin\u00edku a oceli<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stejn\u00fd objem, r\u016fzn\u00e1 hustota:\n<ul class=\"wp-block-list\">\n<li>Ocel: 0,01 m\u00b3 \u00d7 7,850 kg\/m\u00b3 = 78,5 kg<\/li>\n\n\n\n<li>Hlin\u00edk: 0,01 m\u00b3 \u00d7 2 700 kg\/m\u00b3 = 27 kg<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u00daspora hmotnosti = 51,5 kg<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Hustota v oblasti 3D tisku a letectv\u00ed<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3D tisk:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hlin\u00edkov\u00e9 pr\u00e1\u0161ky pro aditivn\u00ed v\u00fdrobu (nap\u0159. AlSi10Mg) maj\u00ed hustotu ~2,68-2,70 g\/cm\u00b3.<\/li>\n\n\n\n<li>Hustota pr\u00e1\u0161ku ovliv\u0148uje p\u00f3rovitost d\u00edl\u016f a pevnost fin\u00e1ln\u00edho v\u00fdrobku.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Letectv\u00ed a kosmonautika:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ni\u017e\u0161\u00ed hustota se p\u0159\u00edmo prom\u00edt\u00e1 do efektivn\u011bj\u0161\u00edch konstrukc\u00ed.<\/li>\n\n\n\n<li>Spole\u010dnosti Boeing a Airbus se ve velk\u00e9 m\u00ed\u0159e spol\u00e9haj\u00ed na slitiny 7xxx a 2xxx.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Souhrnn\u00e1 tabulka:&nbsp;<\/strong><\/h2>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Tabulka 4 Hustoty b\u011b\u017en\u00fdch slitin hlin\u00edku<\/em><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Slitina<\/strong><\/td><td><strong>S\u00e9rie<\/strong><\/td><td><strong>Hustota (g\/cm\u00b3)<\/strong><\/td><td><strong>P\u0159\u00edpad pou\u017eit\u00ed<\/strong><\/td><\/tr><tr><td>1050<\/td><td>1xxx<\/td><td>2.705<\/td><td>Elektrick\u00e9, f\u00f3lie, reflektory<\/td><\/tr><tr><td>2024<\/td><td>2xxx<\/td><td>2.78<\/td><td>Konstrukce letadel<\/td><\/tr><tr><td>3003<\/td><td>3xxx<\/td><td>2.73<\/td><td>N\u00e1dob\u00ed na va\u0159en\u00ed, st\u0159e\u0161n\u00ed krytiny<\/td><\/tr><tr><td>5052<\/td><td>5xxx<\/td><td>2.68<\/td><td>Lodn\u00ed doprava, palivov\u00e9 n\u00e1dr\u017ee<\/td><\/tr><tr><td>6061<\/td><td>6xxx<\/td><td>2.70<\/td><td>Konstrukce, r\u00e1my automobil\u016f<\/td><\/tr><tr><td>6063<\/td><td>6xxx<\/td><td>2.69<\/td><td>Okna, v\u00fdlisky<\/td><\/tr><tr><td>7075<\/td><td>7xxx<\/td><td>2.81<\/td><td>Letectv\u00ed a kosmonautika, r\u00e1my kol<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Z\u00e1v\u011br<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hustota hlin\u00edku a jeho slitin je d\u016fle\u017eitou fyzik\u00e1ln\u00ed vlastnost\u00ed, kter\u00e1 p\u0159\u00edmo ovliv\u0148uje jejich v\u00fdkon, \u00fa\u010dinnost a rozsah pou\u017eit\u00ed. Hustota se obvykle pohybuje v rozmez\u00ed 2,64 a\u017e 2,83 g\/cm\u00b3, <a href=\"https:\/\/www.diecastingschina.com\/cs\/sluzby-tlakoveho-liti-cina\/tlakove-liti-hliniku\/\">hlin\u00edk<\/a> slitiny nab\u00edzej\u00ed ide\u00e1ln\u00ed rovnov\u00e1hu mezi lehkou strukturou a dostate\u010dnou pevnost\u00ed, co\u017e je \u010din\u00ed neoceniteln\u00fdmi v r\u016fzn\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch. Znalost hustoty pom\u00e1h\u00e1 in\u017een\u00fdr\u016fm optimalizovat konstrukci, vyu\u017eit\u00ed materi\u00e1l\u016f a celkov\u00fd v\u00fdkon syst\u00e9mu, od leteck\u00e9ho a automobilov\u00e9ho pr\u016fmyslu a\u017e po stavebnictv\u00ed a obalovou techniku. Legov\u00e1n\u00ed, metody zpracov\u00e1n\u00ed a konstruk\u010dn\u00ed \u00fapravy mohou hustotu m\u00edrn\u011b zm\u011bnit, ale hlavn\u00ed v\u00fdhoda z\u016fst\u00e1v\u00e1: hlin\u00edk je jedn\u00edm z nejleh\u010d\u00edch dostupn\u00fdch konstruk\u010dn\u00edch kov\u016f. S rostouc\u00ed celosv\u011btovou popt\u00e1vkou po lehk\u00fdch, \u00fasporn\u00fdch a udr\u017eiteln\u00fdch materi\u00e1lech si hlin\u00edk d\u00edky sv\u00e9 n\u00edzk\u00e9 hustot\u011b, odolnosti proti korozi a p\u0159izp\u016fsobivosti st\u00e1le udr\u017euje vedouc\u00ed postaven\u00ed. Zvl\u00e1dnut\u00edm jeho vlastnost\u00ed souvisej\u00edc\u00edch s hustotou mohou konstrukt\u00e9\u0159i a in\u017een\u00fd\u0159i posunout hranice v\u00fdkonnosti a z\u00e1rove\u0148 sn\u00ed\u017eit dopad na \u017eivotn\u00ed prost\u0159ed\u00ed. P\u0159i hled\u00e1n\u00ed efektivity z\u016fst\u00e1v\u00e1 n\u00edzk\u00e1 hustota hlin\u00edku z\u00e1kladn\u00edm kamenem modern\u00edho materi\u00e1lov\u00e9ho in\u017een\u00fdrstv\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum is a silvery-white, soft metal of low density which is one of the most abundant metals in the Earth crust and its role in the modern industry cannot not be overstated. Low density is one of the most characteristic strong points of it among other positive qualities. Mass of a material divided by its [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1773,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1772","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-die-casting"],"_links":{"self":[{"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/posts\/1772","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/comments?post=1772"}],"version-history":[{"count":0,"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/posts\/1772\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/media\/1773"}],"wp:attachment":[{"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/media?parent=1772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/categories?post=1772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.diecastingschina.com\/cs\/wp-json\/wp\/v2\/tags?post=1772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}