Aluminium alloy tuag castings yog dav siv nyob rau hauv kev tsim lub cev muaj zog vim lawv cov thermal conductivity zoo, lub teeb yuag, thiab zoo machinability, ua rau lawv cov khoom zoo tagnrho. Txawm li cas los xij, thaum lub sij hawm tsim khoom, aluminium alloy tuag castings feem ntau xav tau kev kho kev laus los txhim kho lawv cov khoom siv kho tshuab.
Kev laus kev kho mob yog hais txog cov txheej txheem kev kho cua sov uas suav nrog kev tuav cov aluminium alloy ntawm qhov kub thiab txias rau ib lub sijhawm, ua rau cov theem ntxiv rau hauv cov khoom siv, yog li ua kom nws lub zog thiab hardness. Kev laus kev kho mob feem ntau muab faib ua natural aging thiab artificial aging. Ntuj kev laus tshwm sim nyob rau hauv chav tsev kub thiab yog ib tug qeeb txheej txheem, thaum lub dag lub zog yuav tsum tau ib tug cua sov rauv, yog ceev, thiab muaj ib tug tseem ceeb nyhuv.
Thaum lub sij hawm kev laus, cov qauv siv lead ua sab hauv ntawm aluminium alloy undergoes microscopic hloov. Cov kev hloov no feem ntau tshwm sim raws li qhov sib txawv ntawm cov atoms nyob rau hauv cov kev daws teeb meem thiab kev tsim cov theem ntxiv. Cov kev hloov microscopic no ua rau muaj kev hloov me ntsis hauv cov khoom ntim, ua rau muaj kev hloov pauv. Feem ntau, cov kev hloov pauv no me me, tab sis lawv tseem xav tau kev saib xyuas hauv kev tsim cov khoom siab -precision qhov chaw.
Tshwj xeeb, tom qab kev laus laus, aluminium alloy tuag castings rau motors feem ntau pom me ntsis shrinkage. Shrinkage yog ze ze rau cov alloy muaj pes tsawg leeg, casting txheej txheem, aging kub, thiab aging lub sij hawm. Piv txwv li, qhov kub thiab txias ntau dua los yog lub sij hawm laus dua ua rau cov theem ua kom muaj zog ntau dua thiab muaj peev xwm shrinkage ntau dua; conversely, qis kub los yog luv luv lub sij hawm aging ua rau tsawg shrinkage. Rau qhov tseem ceeb mating qhov ntev, kev ua tiav yog feem ntau yuav tsum tau tom qab kev laus kho mob kom ntseeg tau tias qhov tseeb ntawm kev sib dhos zaum kawg.
