1. Mechanical nto caws pliav
Cov kab nrib pleb no feem ntau tsis sib sib zog nqus, thiab cov txheej txheem dov nws tus kheej tsis tuaj yeem zam tag nrho cov kev ua kom zoo li no.
2. Cracks generated thaum lub sij hawm quenching
Ib qho yog qhov nthuav ntxiv ntawm cov kab nrib pleb tshwm sim los ntawm kev ntxhov siab thaum lub sij hawm kho cua sov ntawm cov neeg kho tshuab nti; Lwm qhov yog tias cov kab nrib pleb tshiab yog tsim los ntawm kev xaiv tsis raug ntawm cov txheej txheem quenching thiab quenching nruab nrab.
(1) Cov txheej txheem quenching tsis raug, thiab quenching tsis tempered nyob rau hauv lub sij hawm tom qab quenching, thiab nws yog ib qho yooj yim ua rau tawg tsis muaj annealing ua ntej rov quenching.
(2) Cov dej quenching yuav ua rau kub kub ntau dua li cov roj quenching. Nyob rau hauv ib txwm muaj xwm txheej, txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau, dej quenching feem ntau yog siv rau cov hlau, thiab cov roj quenching feem ntau yog siv rau cov hlau alloy. Txawm li cas los xij, cov roj quenching tuaj yeem siv rau cov khoom ua haujlwm nrog lub cheeb ntawm tsawg dua 4 hli, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv ntawm cov pa roj carbon siab, cov roj quenching yuav tsum tsim nyog dua.
