7 mndandanda wa aluminiyamu aloyi ndi Al-Zn-Mg-Cu, Aloyiyo yakhala ikugwiritsidwa ntchito m'makampani opanga ndege kuyambira kumapeto kwa zaka za m'ma 1940. The7075 aluminium alloyali ndi dongosolo lolimba komanso kukana kwamphamvu kwa dzimbiri, zomwe ndi zabwino kwambiri pa ndege ndi mbale za m'madzi.

Mbewu zabwino zimathandizira kubowola kozama ndikuwonjezera kukana kuvala. Mphamvu yabwino kwambiri ya aloyi ya aluminiyamu ndi aloyi ya 7075, koma sungawotchedwe, ndipo kukana kwake kwa dzimbiri kumakhala kovutirapo, magawo ambiri opanga ma CNC amagwiritsa ntchito aloyi 7075. Zinc ndiye chinthu chachikulu cha aloyi pamndandandawu, kuphatikiza kaphatikizidwe kakang'ono ka magnesium kumatha kupangitsa kuti zinthuzo zizitenthedwa, kuti zifike kumphamvu kwambiri.

Mndandanda wa zipangizo zambiri anawonjezera pang'ono mkuwa, chromium ndi aloyi zina, ndipo pakati pa nambala 7075 zotayidwa aloyi makamaka apamwamba, mphamvu apamwamba, oyenera ndege chimango ndi mkulu mphamvu accessories.Makhalidwe ake ndi, pulasitiki yabwino pambuyo pa chithandizo cholimba, chithandizo chothandizira kutentha chimakhala chabwino kwambiri, chimakhala ndi mphamvu zambiri pansi pa 150 ℃, ndipo chimakhala ndi mphamvu yotsika kwambiri ya kutentha; kupsinjika dzimbiri akulimbana chizolowezi; aluminium yokutidwa kapena chitetezo china. Kukalamba kawiri kumatha kukulitsa kukana kwa alloy stress corrosion cracking. Mapulasitiki omwe ali m'malo otsekedwa ndi ongozimitsidwa ndi otsika pang'ono kuposa momwe 2A12 ikuyendera. pang'ono kuposa 7A04, mbale malo amodzi kutopa. Gtch ndi yomvera, kupsinjika kwa corrosion kuli bwino kuposa 7A04. kachulukidwe ndi 2.85 g/cm3.

7075 aluminiyamu aloyi ali ndi katundu makina, makamaka ntchito mbali zotsatirazi:

1. Mphamvu yayikulu: Mphamvu yamakomedwe ya 7075 aluminiyamu aloyi imatha kufika kuposa 560MPa, yomwe ndi yamphamvu kwambiri ya aloyi ya aluminiyamu, yomwe ndi nthawi 2-3 kuposa yazitsulo zina zotayidwa pansi pamikhalidwe yomweyi.

2. Kulimba kwabwino: Chigawo cha shrinkage ndi mlingo wa elongation wa 7075 aluminiyamu alloy ndi okwera kwambiri, ndipo mawonekedwe a fracture ndi fracture yolimba, yomwe ili yoyenera kwambiri pokonza ndi kupanga.

3. Kuchita bwino kwa kutopa: 7075 Aluminiyamu alloy amathabe kukhalabe ndi makina ake abwino pansi pa kupsinjika kwakukulu ndi kubwereza kawirikawiri katundu, popanda okosijeni, ming'alu ndi zochitika zina.

4. yothandiza kwambiri kuteteza kutentha:7075 Aluminiyamu aloyiimatha kukhalabe ndi mawonekedwe ake abwino pamakina otentha kwambiri, omwe ndi mtundu wa aluminiyamu yosamva kutentha kwambiri.

5. Kukana kwabwino kwa dzimbiri: 7075 Aluminiyamu alloy ali ndi kukana bwino kwa dzimbiri ndipo angagwiritsidwe ntchito popanga magawo omwe ali ndi zofunikira zazikulu zokana kuwononga.

Mkhalidwe:

1.O-state: (dziko lowonjezera)

Njira yokwaniritsira: Kutenthetsa zitsulo zotayidwa 7075 kutentha koyenera, nthawi zambiri pa 350-400 madigiri Celsius, sungani kwa kanthawi kenako pang'onopang'ono kuziziritsa kutentha kwa chipinda, cholinga: kuthetsa kupsinjika kwamkati ndikuwongolera pulasitiki ndi kulimba kwa zakuthupi.Kuchuluka kwamphamvu kwamphamvu kwa 7075 (7075-0 tempering) sikudutsa 280 MPa (40,000 psi) ndi mphamvu zokolola zambiri za 140 MPa (21,000 psi). Kukula kwazinthu (kutambasula kusanachitike kulephera komaliza) ndi 9-10%.

2.T6 (mankhwala okalamba):

Kukhazikitsa njira: woyamba olimba njira mankhwala ndi aloyi Kutentha kwa 475-490 madigiri Celsius ndi kuzirala mofulumira ndiyeno ukalamba mankhwala, kawirikawiri pa 120-150 digiri Celsius kutchinjiriza kwa maola angapo, cholinga: kusintha mphamvu ndi kuuma zinthu. .Mtheradi mphamvu yamphamvu ya T6 tempering 7075 ndi 510,540 MPa (74,00078,000 psi) ndi mphamvu zokolola zosachepera 430,480 MPa (63,00069,000 psi). Ili ndi kulephera kuwonjezera kuchuluka kwa 5-11%.

3.T651 (kutambasula + kukalamba kuumitsa):

Kugwiritsa ntchito njira: pamaziko a T6 kukalamba kuumitsa, gawo lina la kutambasula kuthetsa kupsinjika kotsalira, cholinga: kukhalabe ndi mphamvu zambiri ndi kuuma pamene kuwongolera pulasitiki ndi kulimba.Mtheradi mphamvu zamakokedwe za T651 tempering 7075 ndi za 570 MPa (83,000) psi) ndi mphamvu zokolola za 500 MPa (73,000 psi). Ili ndi kuchuluka kwa kulephera kwa 3 - 9%. Makhalidwewa amatha kusinthidwa malinga ndi mawonekedwe azinthu zomwe zimagwiritsidwa ntchito. Ma mbale okhuthala amatha kuwonetsa mphamvu zochepa komanso kutalika kwake kuposa manambala omwe atchulidwa pamwambapa.

Kugwiritsa ntchito kwakukulu kwa 7075 aluminium alloy:

1.Munda wa Aerospace: 7075 aluminium alloy imagwiritsidwa ntchito kwambiri m'munda wamlengalenga chifukwa cha mphamvu zake zazikulu komanso zopepuka. Nthawi zambiri amagwiritsidwa ntchito popanga mapangidwe a ndege, mapiko, bulkheads ndi zigawo zina zofunika, komanso zida zina zomwe zimafuna mphamvu zambiri komanso kukana dzimbiri.

2. Makampani opanga magalimoto: Aluminiyamu ya 7075 alloy imagwiranso ntchito yofunika kwambiri pakupanga magalimoto. Nthawi zambiri amagwiritsidwa ntchito pama braking system ndi chassis m'magalimoto ochita bwino kwambiri komanso magalimoto othamanga, kuti apititse patsogolo magwiridwe antchito agalimoto ndikuchepetsa kulemera.

3. Zida zolimbitsa thupi: Chifukwa cha mphamvu zake zazikulu komanso zopepuka, 7075 aluminiyamu alloy imagwiritsidwa ntchito nthawi zambiri kupanga zida zamasewera, monga ndodo zoyenda, makalabu a gofu, ndi zina zambiri.

4. Kumanga makina: Pamakina opanga makina, 7075 aluminiyamu alloy amagwiritsidwanso ntchito kwambiri popanga zigawo zolondola, nkhungu ndi zina zotero. Komanso, 7075 zotayidwa aloyi ndi chimagwiritsidwa ntchito kuwomba pulasitiki (botolo) nkhungu, akupanga pulasitiki kuwotcherera nkhungu, nsapato nkhungu, pepala nkhungu pulasitiki, thovu kupanga nkhungu, sera nkhungu, chitsanzo, fixture, zida makina, nkhungu processing ndi zina. Amagwiritsidwanso ntchito popanga mafelemu a njinga za aluminiyamu apamwamba kwambiri.

Ndikoyenera kudziwa kuti, ngakhale kuti7075 aluminium alloyali ndi ubwino wambiri, m'pofunikabe kutchera khutu ku ntchito yake yowotcherera yosauka komanso chizolowezi cha kupsinjika kwa dzimbiri, kotero kuti zokutira za aluminiyamu kapena chithandizo china chotetezera chingafunikire kugwiritsidwa ntchito.

Nthawi zambiri, zitsulo zotayidwa 7075 zimakhala ndi malo ofunikira m'mafakitale ambiri chifukwa cha ntchito zake zabwino komanso kugwiritsa ntchito bwino.