Annealing yog ib qho tseem ceeb tab sis feem ntau overlooked kauj ruam hauv kev tsim cov kav hlau kav. Thaum cov neeg yuav khoom feem ntau tsom rau cov khoom siv xws li lub zog tensile thiab elongation, cov txheej txheem annealing ncaj qha txiav txim siab seb cov kev qhia tshwj xeeb tuaj yeem ua tiav.
Ductile hlau, raws li cam khwb cia, muaj dawb carbides thiab pearlitic qauv uas ua rau cov khoom nkig thiab nyuaj rau tshuab los yog txiav ntawm qhov chaw. Lub hom phiaj ntawm annealing yog los hloov cov txheej txheem tsis zoo no rau hauv ferrite, uas muab cov yam ntxwv ductility thiab cuam tshuam tsis kam ntawm cov hlau hlau.
Lub qhov cub annealing ua haujlwm ntawm qhov kub thiab txias feem ntau ntawm 900℃thiab 950 degree. Cov kav dej tau tuav ntawm qhov ntsuas kub no rau lub sijhawm tswj hwm, tso cai rau cov pa roj carbon diffuse thiab precipitate li spheroidal graphite nodules. Qhov no yog ua raws los ntawm kev ua kom txias qeeb thiab meej meej. Yog tias qhov txias txias tshwm sim sai heev, pearlite re-cov ntaub ntawv thiab qhov elongation qhov tseem ceeb poob qis dua li ISO 2531 qhov yuav tsum tau ua ntawm 10% rau cov kav dej siab.
Cov kab kev tsim khoom niaj hnub siv cov khoom siv hluav taws xob txuas ntxiv nrog ntau qhov chaw kub. Tiag -Lub sijhawm ntsuas kub ntawm txhua cheeb tsam ua kom muaj kev kho cua sov zoo ib yam thoob plaws tag nrho cov yeeb nkab ntev, los ntawm lub qhov (socket) mus rau spigot. Cov kav dej uas tsis raug kho kom zoo tuaj yeem dhau qhov kev sim siab hauv lub Hoobkas tab sis yuav ua tsis tiav nyob rau hauv qhov chaw raws li kev thauj khoom, dej rauj, lossis kev txav hauv av.
Rau cov neeg siv khoom xav tau tshwj xeeb microstructures, xws li cov uas xav tau ntau dua hardness rau abrasion -cov ntaub ntawv resistant, manufacturers tuaj yeem kho lub voj voog annealing los tsim pearlitic lossis tempered martensitic matrix. Txawm li cas los xij, rau cov qauv dej thiab cov dej phwj tuaj, cov qauv ferritic tag nrho ua tiav los ntawm kev tsim nyog annealing tseem yog qhov kev xaiv zoo tshaj plaws.