{"id":8426,"date":"2025-03-31T12:29:56","date_gmt":"2025-03-31T12:29:56","guid":{"rendered":"https:\/\/premiumalu.com\/expert-tips-for-success-with-2618-alloy-aluminum\/"},"modified":"2026-07-27T12:39:29","modified_gmt":"2026-07-27T12:39:29","slug":"odborne-tipy-pro-uspech-pri-praci-s-hlinikovou-slitinou-2618","status":"publish","type":"post","link":"https:\/\/premiumalu.com\/cs\/expert-tips-for-success-with-2618-alloy-aluminum\/","title":{"rendered":"Zvl\u00e1dnut\u00ed hlin\u00edkov\u00e9 slitiny 2618: Odborn\u00e9 tipy pro \u00fasp\u011bch"},"content":{"rendered":"

\u00davod<\/h2>\n
\"P\u0159ehled<\/figure>\n

Slitina hlin\u00edku 2618<\/a> je tepeln\u011b zpracovateln\u00e1 tv\u00e1\u0159en\u00e1 hlin\u00edkov\u00e1 slitina \u0159ady 2xxx navr\u017een\u00e1 pro vysokoteplotn\u00ed aplikace. S m\u011bd\u00ed, ho\u0159\u010d\u00edkem a niklem jako hlavn\u00edmi leguj\u00edc\u00edmi prvky si slitina 2618 zachov\u00e1v\u00e1 vynikaj\u00edc\u00ed pevnost p\u0159i zv\u00fd\u0161en\u00fdch teplot\u00e1ch a\u017e do p\u0159ibli\u017en\u011b 200 \u00b0C. Tak\u00e9 vykazuje vysokou odolnost proti \u00fanav\u011b a dobrou odolnost proti te\u010den\u00ed p\u0159i dlouhodob\u00e9m tepeln\u00e9m zat\u00ed\u017een\u00ed.<\/p>\n

Tyto vlastnosti \u010din\u00ed slitinu 2618 preferovan\u00fdm materi\u00e1lem pro leteck\u00e9 sou\u010d\u00e1sti motor\u016f, vysoce v\u00fdkonn\u00e9 p\u00edsty, ob\u011b\u017en\u00e1 kola kompresor\u016f a turb\u00ednov\u00e9 d\u00edly, kde je tepeln\u00e1 stabilita kritick\u00e1. Tento \u010dl\u00e1nek se zab\u00fdv\u00e1 chemick\u00fdm slo\u017een\u00edm slitiny, mechanick\u00fdmi vlastnostmi, praktick\u00fdmi aplikacemi a jej\u00edm srovn\u00e1n\u00edm s jin\u00fdmi hlin\u00edkov\u00fdmi slitinami, jako jsou 2024, 4032, 6061 a 7075.<\/p>\n

Co je hlin\u00edkov\u00e1 slitina 2618<\/h2>\n
\"Chemick\u00e9<\/figure>\n

Hlin\u00edkov\u00e1 slitina 2618 pat\u0159\u00ed do rodiny tepeln\u011b zpracovateln\u00fdch tv\u00e1\u0159en\u00fdch hlin\u00edkov\u00fdch slitin, kter\u00e1 se vyzna\u010duje zachov\u00e1n\u00edm pevnosti p\u0159i zv\u00fd\u0161en\u00fdch teplot\u00e1ch. Jej\u00ed kombinace pevnosti p\u0159i vysok\u00fdch teplot\u00e1ch, odolnosti proti \u00fanav\u011b a obrobitelnosti ji \u010din\u00ed vhodnou pro n\u00e1ro\u010dn\u00e9 aplikace v letectv\u00ed a motoristick\u00e9m sportu.<\/p>\n

Slo\u017een\u00ed slitiny \u2013 p\u0159edev\u0161\u00edm hlin\u00edk s m\u011bd\u00ed, ho\u0159\u010d\u00edkem a niklem \u2013 p\u0159\u00edmo p\u0159isp\u00edv\u00e1 k jej\u00ed tepeln\u00e9 stabilit\u011b. D\u00edky tomu je slitina 2618 spolehlivou volbou, kdy\u017e sou\u010d\u00e1sti mus\u00ed zachovat struktur\u00e1ln\u00ed integritu p\u0159i opakovan\u00e9m tepeln\u00e9m cyklov\u00e1n\u00ed a mechanick\u00e9m nam\u00e1h\u00e1n\u00ed.<\/p>\n

Chemick\u00e9 slo\u017een\u00ed hlin\u00edku 2618<\/h3>\n

Charakteristick\u00e9 vlastnosti hlin\u00edkov\u00e9 slitiny 2618 jsou definov\u00e1ny jej\u00edm chemick\u00fdm slo\u017een\u00edm. N\u00ed\u017ee je uveden p\u0159ehled kl\u00ed\u010dov\u00fdch leguj\u00edc\u00edch prvk\u016f:<\/p>\n

\n\n\n\n\n\n\n\n
Prvek<\/th>\nSlo\u017een\u00ed Procento<\/th>\nRole<\/th>\n<\/tr>\n
Hlin\u00edk<\/td>\n~90%<\/td>\nZ\u00e1kladn\u00ed materi\u00e1l<\/td>\n<\/tr>\n
M\u011b\u010f<\/td>\n2-3%<\/td>\nZvy\u0161uje pevnost, zejm\u00e9na po tepeln\u00e9m zpracov\u00e1n\u00ed<\/td>\n<\/tr>\n
Ho\u0159\u010d\u00edk<\/td>\n1.2-1.8%<\/td>\nSpolupracuje s m\u011bd\u00ed na dal\u0161\u00edm zpevn\u011bn\u00ed slitiny<\/td>\n<\/tr>\n
Nikl<\/td>\n1.2-1.8%<\/td>\nZlep\u0161uje vysokoteplotn\u00ed v\u00fdkon a tepelnou stabilitu<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Tyto leguj\u00edc\u00ed prvky, pe\u010dliv\u011b kontrolovan\u00e9 b\u011bhem v\u00fdroby, umo\u017e\u0148uj\u00ed slitin\u011b 2618 splnit p\u0159\u00edsn\u00e9 normy po\u017eadovan\u00e9 leteck\u00fdm a vysoce v\u00fdkonn\u00fdm pr\u016fmyslem, kde je tepeln\u00e1 stabilita nezbytn\u00e1.<\/p>\n

Kl\u00ed\u010dov\u00e9 fyzik\u00e1ln\u00ed a mechanick\u00e9 vlastnosti<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Majetek<\/strong><\/th>\nHodnota<\/strong><\/th>\nCo to znamen\u00e1<\/strong><\/th>\n<\/tr>\n
Hustota<\/strong><\/td>\n2,75 g\/cm\u00b3<\/td>\nN\u00edzk\u00e1 hmotnost pro vysoce pevnostn\u00ed aplikace<\/td>\n<\/tr>\n
Bod t\u00e1n\u00ed<\/strong><\/td>\n~550-640\u00b0C (1 022-1 184\u00b0F)<\/td>\n\u0160irok\u00fd rozsah tuhnut\u00ed, vhodn\u00fd pro tv\u00e1\u0159en\u00ed za tepla<\/td>\n<\/tr>\n
Pevnost v tahu<\/strong><\/td>\n~420-450 MPa (T6)<\/td>\nVysok\u00e1 pevnost pro n\u00e1ro\u010dn\u00e9 konstruk\u010dn\u00ed aplikace<\/td>\n<\/tr>\n
Pevnost v tahu<\/strong><\/td>\n~350-380 MPa (T6)<\/td>\nDobr\u00e1 odolnost proti trval\u00e9 deformaci<\/td>\n<\/tr>\n
Prodlou\u017een\u00ed<\/strong><\/td>\n~5-10%<\/td>\nSt\u0159edn\u00ed ta\u017enost<\/td>\n<\/tr>\n
Tvrdost<\/strong><\/td>\n~120-130 HB (Brinell, T6)<\/td>\nDobr\u00e1 povrchov\u00e1 tvrdost pro odolnost proti opot\u0159eben\u00ed<\/td>\n<\/tr>\n
Tepeln\u00e1 vodivost<\/strong><\/td>\n~140-155 W\/m-K<\/td>\nSlu\u0161n\u00e1 schopnost p\u0159enosu tepla<\/td>\n<\/tr>\n
\u00danavov\u00e1 pevnost<\/strong><\/td>\n~150-180 MPa<\/td>\nVysok\u00e1 odolnost proti cyklick\u00e9mu zat\u00ed\u017een\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Hlin\u00edkov\u00e1 slitina 2618 poskytuje vyv\u00e1\u017eenou kombinaci st\u0159edn\u00ed hmotnosti, vysok\u00e9 pevnosti a tepeln\u00e9 stability. Jej\u00ed n\u00edzk\u00e1 hustota sni\u017euje hmotnost sou\u010d\u00e1st\u00ed, zat\u00edmco vysok\u00fd rozsah taven\u00ed umo\u017e\u0148uje spolehliv\u00fd provoz v hork\u00fdch prost\u0159ed\u00edch, jako jsou motorov\u00e9 prostory. Pevnost v tahu 420\u2013450 MPa v temperovan\u00e9m stavu T6 a odolnost proti \u00fanav\u011b 150\u2013180 MPa z n\u00ed \u010din\u00ed spolehlivou volbu pro d\u00edly vystaven\u00e9 opakovan\u00e9mu nam\u00e1h\u00e1n\u00ed, jako jsou p\u00edsty a ob\u011b\u017en\u00e1 kola kompresor\u016f.<\/p>\n

V\u00fdhody a omezen\u00ed hlin\u00edkov\u00e9 slitiny 2618<\/h3>\n
\n\n\n\n\n\n\n\n\n
V\u00fdhody<\/strong><\/th>\nOmezen\u00ed<\/strong><\/th>\n<\/tr>\n
Vysok\u00e1 pevnost p\u0159i zv\u00fd\u0161en\u00fdch teplot\u00e1ch<\/td>\nNi\u017e\u0161\u00ed odolnost proti korozi ve srovn\u00e1n\u00ed se slitinami \u0159ady 6xxx a 5xxx<\/td>\n<\/tr>\n
Dobr\u00e1 odolnost proti \u00fanav\u011b<\/td>\nVy\u0161\u0161\u00ed n\u00e1klady ne\u017e u slitin pro v\u0161eobecn\u00e9 pou\u017eit\u00ed<\/td>\n<\/tr>\n
Tepeln\u011b zpracovateln\u00e9 pro zlep\u0161en\u00ed vlastnost\u00ed<\/td>\nN\u00e1chylnost k mezikrystalov\u00e9 korozi pod nap\u011bt\u00edm<\/td>\n<\/tr>\n
Dobr\u00e1 obrobitelnost v tepeln\u011b zpracovan\u00e9m stavu<\/td>\nOmezen\u00e1 tva\u0159itelnost za studena<\/td>\n<\/tr>\n
Sva\u0159iteln\u00e1 specifick\u00fdmi technikami<\/td>\nVy\u017eaduje ochrann\u00e9 povlaky v korozn\u00edm prost\u0159ed\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Praktick\u00e9 aplikace hlin\u00edkov\u00e9 slitiny 2618<\/h2>\n
\"Komponenty<\/figure>\n

Hlin\u00edkov\u00e1 slitina 2618 je vysoce cen\u011bna v letectv\u00ed a motoristick\u00e9m sportu pro sv\u016fj vysok\u00fd pom\u011br pevnosti k hmotnosti a vysokoteplotn\u00ed v\u00fdkon. Nosnost a odolnost proti \u00fanav\u011b slitiny ji \u010din\u00ed ide\u00e1ln\u00ed pro p\u00edsty, v\u00fdkovky a konstruk\u010dn\u00ed sou\u010d\u00e1sti motor\u016f, kde je spolehlivost za extr\u00e9mn\u00edch podm\u00ednek nezbytn\u00e1.<\/p>\n

Letectv\u00ed a motoristick\u00fd sport<\/h3>\n

V letectv\u00ed se hlin\u00edk 2618 pou\u017e\u00edv\u00e1 k v\u00fdrob\u011b d\u00edl\u016f leteck\u00fdch motor\u016f, sou\u010d\u00e1st\u00ed trupu a k\u0159\u00eddeln\u00edch konstrukc\u00ed. Jeho schopnost zachovat pevnost p\u0159i vysok\u00fdch teplot\u00e1ch je kritick\u00e1 pro prost\u0159ed\u00ed proudov\u00fdch motor\u016f, kde jsou sou\u010d\u00e1sti vystaveny trval\u00e9mu tepeln\u00e9mu a mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed.<\/p>\n

P\u00edsty a ob\u011b\u017en\u00e1 kola kompresor\u016f vyroben\u00e9 ze slitiny 2618 si zachov\u00e1vaj\u00ed sv\u016fj tvar a pevnost b\u011bhem provozu p\u0159i vysok\u00fdch teplot\u00e1ch, co\u017e pom\u00e1h\u00e1 motor\u016fm spolehliv\u011b pracovat po dlouh\u00e9 servisn\u00ed intervaly.<\/p>\n

Pr\u016fmysl motoristick\u00e9ho sportu tak\u00e9 spol\u00e9h\u00e1 na slitinu 2618 pro z\u00e1vodn\u00ed motorov\u00e9 p\u00edsty a sou\u010d\u00e1sti. Vysokoteplotn\u00ed odolnost a \u00fanavov\u00e1 pevnost slitiny umo\u017e\u0148uj\u00ed d\u00edl\u016fm vydr\u017eet n\u00e1ro\u010dn\u00e9 podm\u00ednky vysokoot\u00e1\u010dkov\u00fdch z\u00e1vodn\u00edch prost\u0159ed\u00ed.<\/p>\n

Srovn\u00e1n\u00ed: 2618 vs. jin\u00e9 hlin\u00edkov\u00e9 slitiny<\/h2>\n

Zat\u00edmco hlin\u00edkov\u00e1 slitina 2618 vynik\u00e1 ve vysokoteplotn\u00edch aplikac\u00edch, v\u00fdb\u011br spr\u00e1vn\u00e9ho materi\u00e1lu z\u00e1vis\u00ed na konkr\u00e9tn\u00edch po\u017eadavc\u00edch na pevnost, tva\u0159itelnost, odolnost proti korozi a n\u00e1klady. Srovn\u00e1n\u00ed slitiny 2618 s jin\u00fdmi b\u011b\u017en\u00fdmi slitinami pom\u00e1h\u00e1 in\u017een\u00fdr\u016fm \u010dinit informovan\u00e1 materi\u00e1lov\u00e1 rozhodnut\u00ed.<\/p>\n

2618 vs. 4032 vs. 6061 vs. 7075 hlin\u00edk<\/h3>\n
\"Srovn\u00e1n\u00ed<\/figure>\n

Ka\u017ed\u00e1 z t\u011bchto slitin nab\u00edz\u00ed odli\u0161n\u00e9 v\u00fdhody na z\u00e1klad\u011b sv\u00fdch mechanick\u00fdch vlastnost\u00ed a zam\u00fd\u0161len\u00fdch aplikac\u00ed:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Charakteristika<\/strong><\/th>\n2618 Hlin\u00edk<\/strong><\/th>\n4032 Hlin\u00edk<\/strong><\/th>\nHlin\u00edk 6061<\/strong><\/th>\nHlin\u00edk 7075<\/strong><\/th>\n<\/tr>\n
Prim\u00e1rn\u00ed leguj\u00edc\u00ed prvky<\/strong><\/td>\nCu, Mg, Ni<\/td>\nCu, Mg, Si<\/td>\nMg, Si<\/td>\nZn, Cu, Mg<\/td>\n<\/tr>\n
Hustota (g\/cm\u00b3)<\/strong><\/td>\n~2.77<\/td>\n~2.69<\/td>\n~2.70<\/td>\n~2.81<\/td>\n<\/tr>\n
Pevnost v tahu (MPa)<\/strong><\/td>\n~440 (teplota T6)<\/td>\n~380 (teplota T6)<\/td>\n~310 (teplota T6)<\/td>\n~570 (teplota T6)<\/td>\n<\/tr>\n
Mez kluzu (MPa)<\/strong><\/td>\n~370 (teplota T6)<\/td>\n~315 (teplota T6)<\/td>\n~275 (temperace T6)<\/td>\n~505 (temperace T6)<\/td>\n<\/tr>\n
Tepeln\u00e1 odolnost<\/strong><\/td>\nVynikaj\u00edc\u00ed (do ~200 \u00b0C)<\/td>\nDobr\u00e1 (do ~150 \u00b0C)<\/td>\nM\u00edrn\u00e1 (do ~150 \u00b0C)<\/td>\nM\u00edrn\u00e1 (do ~120 \u00b0C)<\/td>\n<\/tr>\n
Odolnost proti korozi<\/strong><\/td>\nSt\u0159edn\u011b t\u011b\u017ek\u00e1 (vy\u017eaduje n\u00e1t\u011bry)<\/td>\nDobr\u00fd (lep\u0161\u00ed ne\u017e 2618)<\/td>\nVelmi dobr\u00e9<\/td>\nDostate\u010dn\u00fd (n\u00e1chyln\u00fd kv\u016fli obsahu Cu)<\/td>\n<\/tr>\n
Obrobitelnost<\/strong><\/td>\nDobr\u00fd<\/td>\nVynikaj\u00edc\u00ed<\/td>\nVelmi dobr\u00e9<\/td>\nSpravedliv\u00e9<\/td>\n<\/tr>\n
Sva\u0159itelnost<\/strong><\/td>\nSpravedliv\u00e9 (je t\u0159eba speci\u00e1ln\u00ed techniky)<\/td>\n\u0160patn\u00fd<\/td>\nVynikaj\u00edc\u00ed<\/td>\n\u0160patn\u00fd<\/td>\n<\/tr>\n
Odolnost proti \u00fanav\u011b<\/strong><\/td>\nVynikaj\u00edc\u00ed<\/td>\nDobr\u00fd<\/td>\nDobr\u00fd<\/td>\nVynikaj\u00edc\u00ed<\/td>\n<\/tr>\n
N\u00e1klady<\/strong><\/td>\nVysok\u00e1<\/td>\nM\u00edrn\u00e1<\/td>\nN\u00edzk\u00e1<\/td>\nVysok\u00e1<\/td>\n<\/tr>\n
Typick\u00e9 aplikace<\/strong><\/td>\nLeteck\u00e9 sou\u010d\u00e1sti motor\u016f, p\u00edsty<\/td>\nAutomobilov\u00e9 p\u00edsty, sou\u010d\u00e1sti motor\u016f<\/td>\nKonstruk\u010dn\u00ed d\u00edly, v\u0161eobecn\u00e9 pou\u017eit\u00ed<\/td>\nLeteck\u00e9 r\u00e1my, vysoce nam\u00e1han\u00e9 d\u00edly<\/td>\n<\/tr>\n
Kl\u00ed\u010dov\u00e1 v\u00fdhoda<\/strong><\/td>\nVysok\u00e1 pevnost p\u0159i zv\u00fd\u0161en\u00fdch teplot\u00e1ch<\/td>\nOdolnost proti opot\u0159eben\u00ed, n\u00edzk\u00e1 tepeln\u00e1 rozta\u017enost<\/td>\nV\u0161estrannost, odolnost proti korozi<\/td>\nV\u00fdjime\u010dn\u00e1 pevnost p\u0159i pokojov\u00e9 teplot\u011b<\/td>\n<\/tr>\n
Kl\u00ed\u010dov\u00e9 omezen\u00ed<\/strong><\/td>\nNi\u017e\u0161\u00ed odolnost proti korozi, vy\u0161\u0161\u00ed n\u00e1klady<\/td>\n\u0160patn\u00e1 sva\u0159itelnost, st\u0159edn\u00ed pevnost<\/td>\nNi\u017e\u0161\u00ed maxim\u00e1ln\u00ed pevnost<\/td>\n\u0160patn\u00e1 sva\u0159itelnost, obavy z koroze<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

2618 hlin\u00edk<\/a> slitina 2618 vynik\u00e1 svou pevnost\u00ed p\u0159i vysok\u00fdch teplot\u00e1ch a dobrou obrobitelnost\u00ed, co\u017e ji \u010din\u00ed ide\u00e1ln\u00ed pro sou\u010d\u00e1sti leteck\u00fdch motor\u016f a vysoce v\u00fdkonn\u00e9 p\u00edsty. Slitina 4032 je preferov\u00e1na pro sou\u010d\u00e1sti motor\u016f d\u00edky sv\u00e9 n\u00edzk\u00e9 tepeln\u00e9 rozta\u017enosti a dobr\u00e9 odolnosti proti opot\u0159eben\u00ed. Slitina 6061, zn\u00e1m\u00e1 svou univerz\u00e1lnost\u00ed, je \u0161iroce pou\u017e\u00edv\u00e1na v konstruk\u010dn\u00edch aplikac\u00edch. Slitina 7075 se svou v\u00fdjime\u010dnou pevnost\u00ed p\u0159i pokojov\u00e9 teplot\u011b zvl\u00e1d\u00e1 vysoce nam\u00e1han\u00e9 konstruk\u010dn\u00ed sc\u00e9n\u00e1\u0159e.<\/p>\n

Kterou slitinu zvolit<\/h3>\n

V\u00fdb\u011br spr\u00e1vn\u00e9 slitiny \u20132618<\/strong>, 4032<\/strong>, 6061<\/strong>, nebo 7075<\/strong>\u2013 z\u00e1vis\u00ed na va\u0161\u00ed konkr\u00e9tn\u00ed aplikaci, provozn\u00edch podm\u00ednk\u00e1ch a priorit\u00e1ch.<\/p>\n

Kl\u00ed\u010dov\u00e9 faktory, kter\u00e9 je t\u0159eba zv\u00e1\u017eit<\/h4>\n