Ma mbale a aluminiyamu a 7xxx amadziwika chifukwa cha kuchuluka kwamphamvu kwa kulemera kwake, zomwe zimawapanga kukhala chisankho chapamwamba pamafakitale ochita bwino kwambiri. Mu bukhuli, tifotokoza zonse zomwe muyenera kudziwa zokhudza banja la alloy iyi, kuchokera pakupanga, kupanga ndi kugwiritsa ntchito.
Kodi 7xxx Series Aluminium ndi chiyani?
The7xxx mndandanda wa aluminiyamu alloy ndi akeku banja la zinc-magnesium alloy (monga 7075, 7050, 7475), lopangidwa mwapadera kuti likhale lamphamvu kwambiri. Zofunika kwambiri zikuphatikizapo:
Zosakaniza zazikulu: zinki (5-8%) + magnesium + mkuwa.
Chithandizo cha Kutentha: Magiredi ambiri okhala ndi chithandizo cha kutentha (T6/T7 temper) kuti chikhale cholimba.
Mphamvu: Kulimba kwamphamvu mpaka 570 MPa (kuposa zitsulo zambiri).
Zindikirani: Kukana kwa dzimbiri ndikotsika pang'ono kuposa 6 mndandanda wa aluminiyamu aloyi (chitetezo chakutchingira).
7075 ndiye aloyi wamba wa 7xxx aluminiyamu wodziwika bwino, mikhalidwe yayikulu ndi mphamvu yayikulu, kukana kutopa kwambiri, ntchito wamba ndi chimango cha ndege, zida zankhondo, ndi zina zambiri.
Chifukwa chosankha a7-mndandanda wa aluminiyamu alloy mbale
Mphamvu Zapamwamba Kwambiri: Zabwino pazigawo zonyamula katundu.
Opepuka: 1/3 kachulukidwe kachitsulo.
Kulimbana ndi Kutentha: Imasunga katundu pa kutentha kokwera.
Kuthekera: Kumakwaniritsa kulolerana kolimba ndi zida zoyenera.
7 mndandanda wa luso la aluminiyamu aloyi kukonza mbale
Kusankha Zida
Zida Zodula: Zida za Carbide kapena polycrystalline diamondi (PCD).
Tool Geometry: Makona okwera kwambiri (12°–15°) kuti muchepetse kutentha.
Kupaka mafuta: Gwiritsani ntchito zoziziritsa kukhosi kuti muchepetse kugundana.
Kuthamanga & Kudyetsa Malangizo
Kugaya: 800-1,200 SFM (mapazi apamwamba pamphindi).
Kubowola: 150-300 RPM yokhala ndi kubowola pochotsa tchipisi.
Pewani Macheza: Tetezani mbale zokhala ndi vacuum fixtures.
Kusamalira Pambuyo Machining
Kuchepetsa Kupsinjika: Zigawo za Anneal kuti mupewe kumenyana.
Anodizing: Ikani anodizing ya Type II kapena III kuti muteteze dzimbiri.
Mavuto Wamba & Mayankho
Stress Corrosion Cracking:
Chifukwa: Kupanikizika kotsalira + malo achinyezi.
Konzani: Gwiritsani ntchito kupsa mtima kwa T73, gwiritsani ntchito zokutira zoteteza.
Kupweteka pa nthawi ya kusamba:
Chifukwa: Zinc wambiri.
Konzani: Gwiritsani ntchito matepi ophimbidwa; onjezerani mafuta ofunikira kwambiri.
Mapulogalamu apamwamba a7xxx Aluminiyamu mbale
Zamlengalenga: Mapiko a mapiko, zida zotera.
Chitetezo: Zida zamagalimoto ankhondo.
Masewera: Mafelemu a njinga, zida zokwerera.
Zagalimoto: Zigawo za injini zopsinjika kwambiri.
Nthawi yotumiza: Mar-14-2025