7 mndandanda wa aluminiyamu aloyi ndi Al-Zn-Mg-Cu, Aloyi yakhala ikugwiritsidwa ntchito popanga 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 kasakaniza wazitsulo zina, ndipo pakati pa nambala 7075 zotayidwa aloyi makamaka apamwamba, mphamvu apamwamba, oyenera ndege chimango ndi mkulu mphamvu accessories. kupsinjika dzimbiri akulimbana chizolowezi; aluminium yokutidwa kapena chitetezo china. Kukalamba kawiri kumatha kukulitsa kukana kwa alloy stress corrosion cracking. Pulasitiki mumalo 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 aluminium alloyali ndi zida zabwino zamakina, magwiridwe antchito mwazinthu izi:

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 yosagwira 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)

Kukhazikitsa njira: Kutenthetsa 7075 zotayidwa aloyi kutentha koyenera, nthawi zambiri 350-400 madigiri Celsius, kusunga kwa nthawi kenako pang'onopang'ono ozizira kutentha firiji, cholinga: kuthetsa nkhawa mkati ndi kusintha plasticity ndi kuuma kwa zinthu. The pazipita amakokedwe mphamvu ya 7075 (7075-0 kutentha) pazipita 28,000 psi (28,000) MPsi si upambana psi mphamvu zokolola 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 kwa zinthu. osachepera 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 570 MPa (83,000 psi) ndi zokolola MP00 3 p500 (p500) 7000 . 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 aluminiyamu alloy amagwiritsidwa 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 mbali zolondola, nkhungu ndi zina zotero. Komanso, 7075 zotayidwa aloyi amagwiritsidwa ntchito kwambiri 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 kupanga 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.