{"id":6820,"date":"2024-11-07T10:15:48","date_gmt":"2024-11-07T10:15:48","guid":{"rendered":"https:\/\/premiumalu.com\/mastering-7075-t6-aluminum-forging-techniques\/"},"modified":"2026-09-12T09:24:51","modified_gmt":"2026-09-12T09:24:51","slug":"zvladnuti-techniky-kovani-hliniku-7075-t6","status":"publish","type":"post","link":"https:\/\/premiumalu.com\/cs\/mastering-7075-t6-aluminum-forging-techniques\/","title":{"rendered":"Kone\u010dn\u00fd pr\u016fvodce kov\u00e1n\u00edm z hlin\u00edku 7075 T6"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Co je kov\u00e1n\u00ed z hlin\u00edku 7075-T6?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">7075 je slitina \u0159ady 7xxx postaven\u00e1 na syst\u00e9mu zinek-ho\u0159\u010d\u00edk-m\u011b\u010f a dosahuje nejvy\u0161\u0161\u00ed pevnosti ze v\u0161ech b\u011b\u017en\u00fdch tv\u00e1\u0159en\u00fdch hlin\u00edkov\u00fdch slitin \u2014 mez pevnosti v tahu dosahuje v temperaci T6 p\u0159ibli\u017en\u011b 572 MPa. Tato pevnost je vykoupena chov\u00e1n\u00edm p\u0159i korozi: T6 nab\u00edz\u00ed pouze m\u00edrnou obecnou odolnost proti korozi a nejslab\u0161\u00ed odolnost proti korozi za nap\u011bt\u00ed (SCC) v r\u00e1mci rodiny 7075, proto v\u011bt\u0161ina aplikac\u00ed vy\u017eaduje povlak nebo p\u0159est\u00e1rlou temperaci.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kov\u00e1n\u00ed je proces, kter\u00fd tuto pevnost p\u0159em\u011b\u0148uje na konstruk\u010dn\u00ed d\u00edl. Lisov\u00e1n\u00ed zah\u0159\u00e1t\u00e9ho polotovaru mezi z\u00e1pustkami uzav\u00edr\u00e1 vnit\u0159n\u00ed dutiny a nut\u00ed zrno sledovat obrys d\u00edlu, co\u017e zvy\u0161uje hou\u017eevnatost a \u00fanavovou \u017eivotnost daleko za \u00farove\u0148, kter\u00e9 lze dos\u00e1hnout odl\u00e9v\u00e1n\u00edm nebo obr\u00e1b\u011bn\u00edm z plechu. Tato v\u00fdhoda sm\u011bru zrna je p\u0159esn\u011b d\u016fvodem, pro\u010d jsou kovan\u00e9 d\u00edly 7075-T6, nikoli pouze plech 7075-T6, specifikov\u00e1ny pro nejn\u00e1ro\u010dn\u011bj\u0161\u00ed zat\u00ed\u017een\u00ed draku letadla a zav\u011b\u0161en\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/What-Is-7075-T6-Aluminum-Forging.png\" alt=\"\" class=\"wp-image-10494\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/What-Is-7075-T6-Aluminum-Forging.png 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/What-Is-7075-T6-Aluminum-Forging-300x225.png 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/What-Is-7075-T6-Aluminum-Forging-768x576.png 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/What-Is-7075-T6-Aluminum-Forging-16x12.png 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/What-Is-7075-T6-Aluminum-Forging-600x450.png 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Porozum\u011bn\u00ed stavu T6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ozna\u010den\u00ed \u201cT6\u201d popisuje pevn\u011b stanoven\u00fd postup tepeln\u00e9ho zpracov\u00e1n\u00ed, nikoli stav po kov\u00e1n\u00ed. V\u00fdkovek opou\u0161t\u00ed z\u00e1pustku m\u011bkk\u00fd; teprve cyklus T6 mu dod\u00e1 plnou pevnost.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rozpou\u0161t\u011bc\u00ed \u017e\u00edh\u00e1n\u00ed zah\u0159\u00edv\u00e1 d\u00edl na 465\u2013485 \u00b0C po dobu 1\u20134 hodin, aby se zinek, ho\u0159\u010d\u00edk a m\u011b\u010f rozpustily do jednof\u00e1zov\u00e9ho tuh\u00e9ho roztoku. Rychl\u00e9 kalen\u00ed do vody (nad 100 \u00b0C\/s, do 30 sekund) uzamkne tyto prvky na m\u00edst\u011b d\u0159\u00edve, ne\u017e mohou precipitovat. Um\u011bl\u00e9 st\u00e1rnut\u00ed p\u0159i 120 \u00b0C po p\u0159ibli\u017en\u011b 24 hodin pak precipitac\u00ed vytvo\u0159\u00ed jemn\u00e9 \u010d\u00e1stice \u03b7\u2032 (MgZn\u2082), kter\u00e9 blokuj\u00ed pohyb dislokac\u00ed a zvy\u0161uj\u00ed pevnost.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T6 vs. T652 pro v\u00fdkovky<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T652 je varianta T6 relevantn\u00ed pro v\u00fdkovky. Po kalen\u00ed d\u00edl podstoup\u00ed tlakov\u00e9 odstran\u011bn\u00ed zbytkov\u00e9ho nap\u011bt\u00ed \u2014 lis o s\u00edle 500\u20133000 tun vytla\u010d\u00ed zbytkov\u00e9 nap\u011bt\u00ed z kalen\u00ed 60\u201390 MPa \u2014 a pot\u00e9 st\u00e1rne. Mechanick\u00e1 pevnost z\u016fst\u00e1v\u00e1 bl\u00edzko \u00farovn\u00edm T6, ale zbytkov\u00e9 nap\u011bt\u00ed kles\u00e1 na 20\u201340 MPa a rozm\u011brov\u00e1 stabilita se zlep\u0161uje, co\u017e je d\u016fvod, pro\u010d jsou kovan\u00e9 leteck\u00e9 d\u00edly obvykle specifikov\u00e1ny jako T652 sp\u00ed\u0161e ne\u017e jako prost\u00e9 T6.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mechanick\u00e9 vlastnosti 7075-T6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Toto jsou typick\u00e9 hodnoty pro v\u00fdkovky a plechy T6. Ov\u011b\u0159te je proti certifik\u00e1tu o zkou\u0161ce z v\u00fdroby pro konkr\u00e9tn\u00ed pr\u016f\u0159ez a temperaci.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Majetek<\/th><th>7075-T6<\/th><th>Pozn\u00e1mky<\/th><\/tr><\/thead><tbody><tr><td>Pevnost v tahu (UTS)<\/td><td>572 MPa (83 ksi)<\/td><td>\u0160pi\u010dka mezi b\u011b\u017en\u00fdmi tv\u00e1\u0159en\u00fdmi slitinami Al<\/td><\/tr><tr><td>Mez kluzu (YS)<\/td><td>503 MPa (73 ksi)<\/td><td>~80 % nad 6061-T6<\/td><\/tr><tr><td>Prodlou\u017een\u00ed<\/td><td>8\u201311%<\/td><td>Kles\u00e1 u T652<\/td><\/tr><tr><td>Tvrdost<\/td><td>~150 HB<\/td><td>\u2014<\/td><\/tr><tr><td>Modul pru\u017enosti<\/td><td>~72 GPa<\/td><td>\u2014<\/td><\/tr><tr><td>\u00danavov\u00e1 pevnost (10\u2077 cykl\u016f)<\/td><td>~160 MPa<\/td><td>Sm\u011br zrna ji u v\u00fdkovk\u016f zvy\u0161uje<\/td><\/tr><tr><td>Hustota<\/td><td>2,81 g\/cm\u00b3<\/td><td>\u2014<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hodnota, kter\u00e1 \u0159\u00edd\u00ed v\u011bt\u0161inu rozhodnut\u00ed, je mez kluzu. P\u0159i 503 MPa p\u0159en\u00e1\u0161\u00ed 7075-T6 p\u0159ibli\u017en\u011b o 80 % v\u011bt\u0161\u00ed zat\u00ed\u017een\u00ed ne\u017e 6061-T6, ne\u017e se podd\u00e1, co\u017e je d\u016fvod, pro\u010d nahrazuje ocel v konstrukc\u00edch s kritickou hmotnost\u00ed \u2014 ale pr\u00e1v\u011b tato precipitac\u00ed zpevn\u011bn\u00e1 mikrostruktura zp\u016fsobuje jeho citlivost na SCC a obt\u00ed\u017enou sva\u0159itelnost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Proces kov\u00e1n\u00ed 7075-T6<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/The-7075-T6-Forging-Process.png\" alt=\"\" class=\"wp-image-10498\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/The-7075-T6-Forging-Process.png 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/The-7075-T6-Forging-Process-300x225.png 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/The-7075-T6-Forging-Process-768x576.png 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/The-7075-T6-Forging-Process-16x12.png 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/The-7075-T6-Forging-Process-600x450.png 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Kov\u00e1n\u00ed 7075-T6 prob\u00edh\u00e1 v \u0159\u00edzen\u00e9m sledu: zah\u0159\u00e1t\u00ed polotovaru, deformace mezi z\u00e1pustkami a pot\u00e9 aplikace tepeln\u00e9ho zpracov\u00e1n\u00ed T6. Mal\u00e9 odchylky v teplot\u011b nebo \u00fab\u011bru p\u0159episuj\u00ed mikrostrukturu, tak\u017ee okno je \u00fazk\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Kov\u00e1n\u00ed do voln\u00e9 z\u00e1pustky vs. kov\u00e1n\u00ed do uzav\u0159en\u00e9 z\u00e1pustky<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Open-Die-vs-Closed-Die-Forging.png\" alt=\"\" class=\"wp-image-10495\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Open-Die-vs-Closed-Die-Forging.png 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Open-Die-vs-Closed-Die-Forging-300x225.png 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Open-Die-vs-Closed-Die-Forging-768x576.png 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Open-Die-vs-Closed-Die-Forging-16x12.png 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Open-Die-vs-Closed-Die-Forging-600x450.png 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Faktor<\/th><th>Voln\u00e1 z\u00e1pustka<\/th><th>Uzav\u0159en\u00e1 z\u00e1pustka<\/th><\/tr><\/thead><tbody><tr><td>Nejlep\u0161\u00ed pro<\/td><td>Kotou\u010de, prstence, bloky, p\u0159edkovky<\/td><td>Slo\u017eit\u00e9, t\u00e9m\u011b\u0159 kone\u010dn\u00e9 tvary<\/td><\/tr><tr><td>P\u0159\u00eddavek na obr\u00e1b\u011bn\u00ed<\/td><td>5\u201310 mm<\/td><td>0,5\u20132 mm<\/td><\/tr><tr><td>Vyu\u017eit\u00ed materi\u00e1lu<\/td><td>60\u201370%<\/td><td>80\u201395%<\/td><\/tr><tr><td>N\u00e1klady na z\u00e1pustku<\/td><td>N\u00edzk\u00e9 \u2014 vhodn\u00e9 pro mal\u00e9 s\u00e9rie<\/td><td>Vysok\u00e9 \u2014 vhodn\u00e9 pro s\u00e9riovou v\u00fdrobu<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Kov\u00e1n\u00ed do uzav\u0159en\u00e9 z\u00e1pustky je v\u00fdchoz\u00ed volbou pro hotov\u00e9 leteck\u00e9 d\u00edly, proto\u017ee dutina definuje tvar a zrno sleduje obrys. Pr\u00e1ce s volnou z\u00e1pustkou z\u016fst\u00e1v\u00e1 u\u017eite\u010dn\u00e1 pro prstence, bloky a p\u0159edkovky, kter\u00e9 se pozd\u011bji obr\u00e1b\u011bj\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Parametry a kroky kov\u00e1n\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159edeh\u0159ev polotovaru prob\u00edh\u00e1 p\u0159i 370\u2013420 \u00b0C a samotn\u00e9 kov\u00e1n\u00ed z\u016fst\u00e1v\u00e1 v okn\u011b 370\u2013450 \u00b0C. Pod t\u00edmto rozsahem kov prask\u00e1 nebo \u0161patn\u011b te\u010de; nad n\u00edm zrna hrubnou a pevnost kles\u00e1. Ka\u017ed\u00fd zdvih p\u0159id\u00e1v\u00e1 deformaci a kumulativn\u00ed pom\u011br \u00fab\u011bru by m\u011bl dos\u00e1hnout alespo\u0148 4:1 a\u017e 6:1, aby se rozru\u0161ila l\u00edc\u00ed struktura a vytvo\u0159ilo se jemn\u00e9, sm\u011brov\u00e9 zrno.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Po kov\u00e1n\u00ed a \u0159\u00edzen\u00e9m chlazen\u00ed d\u00edl proch\u00e1z\u00ed v\u00fd\u0161e uveden\u00fdm cyklem T6 (rozpou\u0161t\u011bn\u00ed \u2192 kalen\u00ed \u2192 st\u00e1rnut\u00ed). Pro T652 je krok tlakov\u00e9ho odstran\u011bn\u00ed nap\u011bt\u00ed vlo\u017een p\u0159\u00edmo po kalen\u00ed. Kone\u010dn\u00e9 vlastnosti z\u00e1vis\u00ed stejn\u011b tak na tomto tepeln\u00e9m zpracov\u00e1n\u00ed jako na samotn\u00e9m kov\u00e1n\u00ed, proto kov\u00e1rna a kal\u00edrna mus\u00ed pracovat podle jedn\u00e9 specifikace.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kde se pou\u017e\u00edv\u00e1 kovan\u00fd 7075-T6<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Where-Forged-7075-T6-Is-Used.png\" alt=\"\" class=\"wp-image-10497\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Where-Forged-7075-T6-Is-Used.png 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Where-Forged-7075-T6-Is-Used-300x225.png 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Where-Forged-7075-T6-Is-Used-768x576.png 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Where-Forged-7075-T6-Is-Used-16x12.png 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/Where-Forged-7075-T6-Is-Used-600x450.png 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Kovan\u00fd 7075-T6 si vydob\u00fdv\u00e1 sv\u00e9 m\u00edsto v\u0161ude tam, kde pevnost, \u00fanavov\u00e1 \u017eivotnost a hmotnost le\u017e\u00ed na stejn\u00e9 kritick\u00e9 cest\u011b.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Letectv\u00ed a obrana<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00edly podvozku, nosn\u00edky k\u0159\u00eddel, \u017eebra a \u00fachytky trupu pou\u017e\u00edvaj\u00ed kovan\u00fd 7075-T6, proto\u017ee uspo\u0159\u00e1dan\u00fd sm\u011br zrna odol\u00e1v\u00e1 cyklick\u00fdm zat\u00ed\u017een\u00edm, kter\u00fdm tyto d\u00edly \u010del\u00ed po desetilet\u00ed. Sekce kritick\u00e9 z hlediska SCC p\u0159ech\u00e1zej\u00ed na temperaci T73 nebo T7352; zbytek z\u016fst\u00e1v\u00e1 p\u0159i T6 nebo T652 s povlakem.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Automobilov\u00fd pr\u016fmysl a v\u00fdkonnostn\u00ed zav\u011b\u0161en\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ramena zav\u011b\u0161en\u00ed, t\u011bhlice a vzp\u011bry pou\u017e\u00edvaj\u00ed kovan\u00fd 7075-T6 ke sn\u00ed\u017een\u00ed neodpru\u017een\u00e9 hmotnosti bez ob\u011btov\u00e1n\u00ed tuhosti pot\u0159ebn\u00e9 p\u0159i n\u00e1razov\u00e9m zat\u00ed\u017een\u00ed a zat\u00ed\u017een\u00ed v zat\u00e1\u010dk\u00e1ch. Jak odleh\u010dov\u00e1n\u00ed postupuje za hranice p\u0159i\u0161roubovan\u00fdch d\u00edl\u016f, kovan\u00fd 7075-T6 se p\u0159esouv\u00e1 ze z\u00e1vodn\u00edch voz\u016f do v\u00fdkonnostn\u00edch lini\u00ed s vy\u0161\u0161\u00edmi objemy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pr\u016fmysl a sportovn\u00ed pot\u0159eby<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hydraulick\u00e9 komponenty, formy a n\u00e1stroje t\u011b\u017e\u00ed z tvrdosti slitiny a rozm\u011brov\u00e9 stability po odstran\u011bn\u00ed nap\u011bt\u00ed. Horolezeck\u00e9 vybaven\u00ed, kliky j\u00edzdn\u00edch kol a baseballov\u00e9 p\u00e1lky ji pou\u017e\u00edvaj\u00ed tam, kde mal\u00fd, pevn\u00fd a proti \u00fanav\u011b odoln\u00fd d\u00edl z\u00e1le\u017e\u00ed v\u00edce ne\u017e n\u00edzk\u00e1 cena.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T6 vs. jin\u00e9 temperace 7075 \u2014 jak volit<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/T6-vs-Other-7075-Tempers-\u2014-How-to-Choose.png\" alt=\"\" class=\"wp-image-10496\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/T6-vs-Other-7075-Tempers-\u2014-How-to-Choose.png 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/T6-vs-Other-7075-Tempers-\u2014-How-to-Choose-300x225.png 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/T6-vs-Other-7075-Tempers-\u2014-How-to-Choose-768x576.png 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/T6-vs-Other-7075-Tempers-\u2014-How-to-Choose-16x12.png 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2024\/11\/T6-vs-Other-7075-Tempers-\u2014-How-to-Choose-600x450.png 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Temperament<\/th><th>Zpracov\u00e1n\u00ed<\/th><th>Mez pevnosti \/ mez kluzu (MPa)<\/th><th>Nejlep\u0161\u00ed pro<\/th><th>Vyhnout se, kdy\u017e<\/th><\/tr><\/thead><tbody><tr><td>T6<\/td><td>Rozpou\u0161t\u011bn\u00ed + kalen\u00ed + st\u00e1rnut\u00ed<\/td><td>572 \/ 503<\/td><td>\u0160pi\u010dkov\u00e1 pevnost, d\u00edly bez SCC<\/td><td>Expozice SCC, t\u011bsn\u00e9 tolerance po obr\u00e1b\u011bn\u00ed<\/td><\/tr><tr><td>T651<\/td><td>T6 + prota\u017een\u00ed (plech)<\/td><td>572 \/ 503<\/td><td>Plech, kter\u00fd mus\u00ed z\u016fstat ploch\u00fd<\/td><td>V\u00fdkovky (pou\u017eijte T652)<\/td><\/tr><tr><td>T652<\/td><td>T6 + odstran\u011bn\u00ed zbytkov\u00e9ho pnut\u00ed<\/td><td>~570 \/ ~500<\/td><td>V\u00fdkovky vy\u017eaduj\u00edc\u00ed rozm\u011brovou stabilitu<\/td><td>Nejni\u017e\u0161\u00ed n\u00e1klady jsou prioritou<\/td><\/tr><tr><td>T73<\/td><td>P\u0159est\u00e1rl\u00e9<\/td><td>~483 \/ ~414<\/td><td>Siln\u00e9 d\u00edly kritick\u00e9 z hlediska SCC<\/td><td>Je vy\u017eadov\u00e1na maxim\u00e1ln\u00ed pevnost<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Kdy je T6 spr\u00e1vn\u00e1 volba<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u00edl je vystaven vysok\u00e9mu statick\u00e9mu zat\u00ed\u017een\u00ed, ale nikoli trval\u00e9mu tahov\u00e9mu nap\u011bt\u00ed v korozivn\u00edm prost\u0159ed\u00ed \u2014 t\u00e1hla podvozku, konstruk\u010dn\u00ed konzoly.<\/li>\n\n\n\n<li>C\u00edlem projektu je sn\u00ed\u017een\u00ed hmotnosti oproti oceli a geometrie m\u016f\u017ee b\u00fdt povlakov\u00e1na nebo pl\u00e1tov\u00e1na pro ochranu proti korozi.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Kdy se hod\u00ed jin\u00e9 temperov\u00e1n\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T73 a T7352 vym\u011b\u0148uj\u00ed 15\u201320 % pevnosti za v\u00fdrazn\u011b lep\u0161\u00ed odolnost proti SCC, co\u017e je standardn\u00ed volba pro siln\u00e9 pr\u016f\u0159ezy ve vlhk\u00e9m nebo slan\u00e9m prost\u0159ed\u00ed. T652 je v\u00fdchoz\u00ed stav pro v\u00fdkovky, kdy\u017e je rozm\u011brov\u00e1 stabilita po obr\u00e1b\u011bn\u00ed d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e posledn\u00edch n\u011bkolik MPa meze kluzu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pr\u00e1ce s v\u00fdkovkem z 7075-T6 \u2014 co pot\u0159ebujete v\u011bd\u011bt<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Obr\u00e1b\u011bn\u00ed je p\u0159\u00edmo\u010dar\u00e9 se spr\u00e1vn\u00fdm nastaven\u00edm. Karbidov\u00e9 n\u00e1stroje, tuh\u00e9 up\u00edn\u00e1n\u00ed a p\u0159\u00edvalov\u00e9 chlazen\u00ed zabra\u0148uj\u00ed rozmaz\u00e1v\u00e1n\u00ed povrchu zpevn\u011bn\u00e9ho za studena; 7075-T6 produkuje \u010dist\u00e9 t\u0159\u00edsky a udr\u017euje t\u011bsn\u00e9 tolerance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sva\u0159ov\u00e1n\u00ed se obecn\u011b vyh\u00fdb\u00e1me. Obsah m\u011bdi a zinku zp\u016fsobuje hork\u00e9 prask\u00e1n\u00ed a tepeln\u011b ovlivn\u011bn\u00e1 z\u00f3na ztr\u00e1c\u00ed velkou \u010d\u00e1st sv\u00e9 pevnosti; sva\u0159ovan\u00e9 spoje tak\u00e9 vykazuj\u00ed \u0161patn\u00e9 v\u00fdsledky z hlediska koroze a SCC. N\u00fdty, \u0161rouby a lepen\u00ed jsou b\u011b\u017en\u00e9 zp\u016fsoby spojov\u00e1n\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ochrana proti korozi je ve v\u011bt\u0161in\u011b prost\u0159ed\u00ed povinn\u00e1. T6 odol\u00e1v\u00e1 vnit\u0159n\u00ed atmosf\u00e9\u0159e, ale v prost\u0159ed\u00ed s chloridy podl\u00e9h\u00e1 bodov\u00e9 korozi, tak\u017ee anodizace, lakov\u00e1n\u00ed nebo pl\u00e1tov\u00e1n\u00ed jsou standardem; pro jak\u00e9koli slan\u00e9 nebo trvale vlhk\u00e9 prost\u0159ed\u00ed p\u0159ejd\u011bte na T73, m\u00edsto abyste se spol\u00e9hali pouze na povlak.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Navrhujte s ohledem na proces ji\u017e od za\u010d\u00e1tku. Dodr\u017eujte pom\u011br redukce alespo\u0148 4:1, pou\u017e\u00edvejte velkorys\u00e9 zaoblen\u00ed a \u00fakosy, vyh\u00fdbejte se tenk\u00fdm pr\u016f\u0159ez\u016fm, kter\u00e9 p\u0159\u00edli\u0161 rychle chladnou, a orientujte d\u00edl tak, aby tok zrn prob\u00edhal pod\u00e9l hlavn\u00ed cesty nap\u011bt\u00ed. Tato rozhodnut\u00ed ur\u010duj\u00ed, zda v\u00fdkovek p\u0159ekon\u00e1 obr\u00e1b\u011bnou desku z hlediska \u00fanavy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdhody a omezen\u00ed na prvn\u00ed pohled<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Rozm\u011br<\/th><th>S\u00edla<\/th><th>Pozor na<\/th><\/tr><\/thead><tbody><tr><td>Pom\u011br pevnosti k hmotnosti<\/td><td>Nejvy\u0161\u0161\u00ed z b\u011b\u017en\u00fdch tv\u00e1\u0159en\u00fdch Al slitin<\/td><td>Vy\u0161\u0161\u00ed n\u00e1klady na materi\u00e1l a kov\u00e1n\u00ed<\/td><\/tr><tr><td>\u00danavov\u00e1 \u017eivotnost<\/td><td>Vynikaj\u00edc\u00ed s uspo\u0159\u00e1dan\u00fdm tokem zrn<\/td><td>Z\u00e1vis\u00ed na kvalit\u011b kov\u00e1n\u00ed<\/td><\/tr><tr><td>Obrobitelnost<\/td><td>Dobr\u00e9 s karbidem + chladic\u00ed kapalinou<\/td><td>Zpev\u0148uje povrch<\/td><\/tr><tr><td>Koroze<\/td><td>St\u0159edn\u00ed obecn\u00e1, \u0161patn\u00e1 SCC (T6)<\/td><td>Vy\u017eaduje povlak; T73 pro slan\u00e9 prost\u0159ed\u00ed<\/td><\/tr><tr><td>Sva\u0159itelnost<\/td><td>\u0160patn\u00e9 \u2014 spojov\u00e1n\u00ed spojovac\u00edmi prvky<\/td><td>Omezuje mo\u017enosti opravy<\/td><\/tr><tr><td>Dostupnost<\/td><td>B\u011b\u017en\u00e9 v leteck\u00e9m dodavatelsk\u00e9m \u0159et\u011bzci<\/td><td>Siln\u00e9 v\u00fdkovky T73 stoj\u00ed v\u00edce<\/td><\/tr><tr><td>N\u00e1klady<\/td><td>Vy\u0161\u0161\u00ed ne\u017e slitiny 6xxx<\/td><td>Ospravedln\u011bno pom\u011brem zat\u00ed\u017een\u00ed\/hmotnosti<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Z\u00e1v\u011br<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdkovek z 7075-T6 p\u0159em\u011b\u0148uje nejpevn\u011bj\u0161\u00ed b\u011b\u017enou tv\u00e1\u0159enou hlin\u00edkovou slitinu na hutn\u00e9 d\u00edly odoln\u00e9 proti \u00fanav\u011b, jejich\u017e zrno sleduje cestu zat\u00ed\u017een\u00ed \u2014 kompromis je re\u00e1ln\u00fd: T6 poskytuje \u0161pi\u010dkovou pevnost, ale nejslab\u0161\u00ed odolnost proti SCC z cel\u00e9 \u0159ady, pouze m\u00edrnou obecnou odolnost proti korozi a v podstat\u011b \u017e\u00e1dnou sva\u0159itelnost, tak\u017ee povlakov\u00e1n\u00ed a mechanick\u00e9 spojov\u00e1n\u00ed jsou normou. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Spole\u010dnost Linsy Aluminum, v\u00fdrobn\u00ed z\u00e1vod v Shenzhenu s v\u00edce ne\u017e 20 lety zku\u0161enost\u00ed, dod\u00e1v\u00e1 <a href=\"https:\/\/premiumalu.com\/cs\/produkt\/slitina-hliniku-7075\/\">V\u00fdkovky z 7075-T6 a T652<\/a> a souvisej\u00edc\u00ed stavy tepeln\u00e9ho zpracov\u00e1n\u00ed s \u00faplnou dokumentac\u00ed MTC ke ka\u017ed\u00e9 objedn\u00e1vce a zku\u0161ebn\u00edmi protokoly SGS na vy\u017e\u00e1d\u00e1n\u00ed; typick\u00e1 dodac\u00ed lh\u016fta pro zak\u00e1zkovou v\u00fdrobu je 10\u201360 dn\u00ed v z\u00e1vislosti na velikosti a zpracov\u00e1n\u00ed. Za\u0161lete v\u00fdkres v\u00fdkovku pro posouzen\u00ed proveditelnosti a vhodnosti jakosti \u2014 Linsy Aluminum podporuje zak\u00e1zkov\u00e9 v\u00fdkovky s n\u00edzk\u00fdm minim\u00e1ln\u00edm objemem objedn\u00e1vky nap\u0159\u00ed\u010d \u0159adami 1000\u20138000 s vlastn\u00edm tepeln\u00fdm zpracov\u00e1n\u00edm a dokon\u010dovac\u00edmi operacemi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Jak\u00fd je rozd\u00edl mezi kov\u00e1n\u00edm 7075-T6 a T652?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ob\u011b dosahuj\u00ed t\u00e9m\u011b\u0159 identick\u00e9 pevnosti, ale T652 p\u0159id\u00e1v\u00e1 1\u20135% uvoln\u011bn\u00ed tlakov\u00e9ho nap\u011bt\u00ed ihned po kalen\u00ed. To sni\u017euje zbytkov\u00e9 nap\u011bt\u00ed z 60\u201390 MPa na 20\u201340 MPa a zlep\u0161uje rozm\u011brovou stabilitu, tak\u017ee T652 je obvykl\u00e1 specifikace pro obr\u00e1b\u011bn\u00e1 leteck\u00e1 kov\u00e1n\u00ed, zat\u00edmco T6 se hod\u00ed pro m\u00e9n\u011b kritick\u00e9 d\u00edly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Lze hlin\u00edk 7075-T6 sva\u0159ovat?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sva\u0159ov\u00e1n\u00ed se obecn\u011b vyh\u00fdb\u00e1me. M\u011b\u010f a zinek zp\u016fsobuj\u00ed hork\u00e9 prask\u00e1n\u00ed, tepeln\u011b ovlivn\u011bn\u00e1 z\u00f3na ztr\u00e1c\u00ed velkou \u010d\u00e1st sv\u00e9 pevnosti a spoj je n\u00e1chyln\u00fd ke korozi a SCC. N\u00fdty, \u0161rouby nebo lepen\u00ed jsou standardn\u00ed metody spojov\u00e1n\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Jak\u00e1 teplota se pou\u017e\u00edv\u00e1 pro kov\u00e1n\u00ed 7075-T6?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159edeh\u0159ev polotovaru prob\u00edh\u00e1 p\u0159i 370\u2013420 \u00b0C a kov\u00e1n\u00ed z\u016fst\u00e1v\u00e1 v rozmez\u00ed 370\u2013450 \u00b0C. Udr\u017eov\u00e1n\u00ed v tomto okn\u011b udr\u017euje kov v toku bez hrubnut\u00ed zrna; kalen\u00ed a st\u00e1rnut\u00ed n\u00e1sledn\u011b dokon\u010d\u00ed stav T6.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Je v\u00fdkovek z 7075-T6 vhodn\u00fd pro mo\u0159sk\u00e9 nebo slan\u00e9 prost\u0159ed\u00ed?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ne ve stavu T6. V prost\u0159ed\u00ed s chloridy podl\u00e9h\u00e1 bodov\u00e9 korozi a T6 m\u00e1 nejhor\u0161\u00ed odolnost proti SCC z \u0159ady 7075. Pro slan\u00e9 nebo trvale vlhk\u00e9 prost\u0159ed\u00ed specifikujte p\u0159est\u00e1rl\u00fd stav T73 nebo T7352 a st\u00e1le aplikujte povlak.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Jak si v\u00fdkovek z 7075-T6 stoj\u00ed ve srovn\u00e1n\u00ed s obr\u00e1b\u011bn\u00edm z desky?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kov\u00e1n\u00ed uzav\u00edr\u00e1 vnit\u0159n\u00ed dutiny a orientuje zrno podle tvaru d\u00edlu, \u010d\u00edm\u017e zvy\u0161uje hou\u017eevnatost a \u00fanavovou \u017eivotnost ve srovn\u00e1n\u00ed s obr\u00e1b\u011bnou deskou ze stejn\u00e9 slitiny a stavu. Tak\u00e9 \u0161et\u0159\u00ed materi\u00e1l d\u00edky tvaru bl\u00edzk\u00e9mu kone\u010dn\u00e9mu, a\u010dkoli n\u00e1stroje pro z\u00e1pustkov\u00e9 kov\u00e1n\u00ed p\u0159id\u00e1vaj\u00ed po\u010d\u00e1te\u010dn\u00ed n\u00e1klady, kter\u00e9 se vyplat\u00ed p\u0159i s\u00e9riov\u00e9 v\u00fdrob\u011b.<\/p>","protected":false},"excerpt":{"rendered":"<p>What Is 7075-T6 Aluminum Forging? 7075 is a 7xxx-series alloy built on a zinc-magnesium-copper system, and it delivers the highest strength of any common wrought aluminum \u2014 ultimate tensile strength reaches about 572 MPa in the T6 temper. That strength comes at the cost of corrosion behavior: T6 offers only moderate general corrosion resistance and [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":10493,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"7075-T6 Aluminum Forging: Process & Temper Guide","_seopress_titles_desc":"SEO Title: 7075-T6 Aluminum Forging: Process & Temper Guide Meta Description: 7075-T6 aluminum forging delivers peak strength with aligned grain flow. Explore the forging process, T6 vs T652 temper choice, key properties, and sourcing.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-6820","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/posts\/6820","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/comments?post=6820"}],"version-history":[{"count":2,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/posts\/6820\/revisions"}],"predecessor-version":[{"id":10499,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/posts\/6820\/revisions\/10499"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/media\/10493"}],"wp:attachment":[{"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/media?parent=6820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/categories?post=6820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/tags?post=6820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}