Kev kho cua sov yog siv los hloov cov khoom ntawm lub cevcov saw hlau txuas puag ncig, feem ntau yog kom ua kom lub zog thiab kev hnav ntawm cov saw hlau txuas puag ncig thaum tswj tau qhov tawv thiab ductility txaus rau daim ntawv thov. Kev kho cua sov suav nrog kev siv cua sov, txias sai (quenching), thiab qee zaum txawm tias txias ntawm cov khoom mus rau qhov kub heev kom tau txais qhov tshwm sim xav tau.
Txhua yam hlau muaj qee yam microstructure. Cov molecules hloov qhov chaw thaum cua sov. Thaum cov hlau raug quenched, cov molecules tseem nyob hauv cov microstructure tshiab, nrog rau qib hardness nce ntxiv thiab kev cia siab ntawm lub zog thiab kev tiv thaiv hnav ntawm cov khoom. Cov khoom ntawm cov saw hlau raug kho cua sov sib cais ua ntej sib dhos, uas pab teeb tsa lub hom phiaj ntawm txhua yam khoom mus rau qhov xwm txheej zoo tagnrho. Muaj ntau txoj kev kho cua sov sib txawv uas tuaj yeem siv los kho cov qib hardness thiab qhov tob. Peb txoj kev kho cua sov feem ntau rau cov khoom saw hlau yog:
Los ntawm kev ua kom tawv
Los ntawm kev ua kom tawv yog cov txheej txheem ntawm kev ua kom sov, quenching thiab tempering cov saw hlau sib txuas. Cov txheej txheem no ua rau cov khoom siv tawv thiab muaj zog sib npaug thoob plaws hauv tag nrho cov saw hlau sib txuas, tsis zoo li qee txoj hauv kev uas tsuas yog ua kom txheej sab nraud tawv. Qhov tshwm sim yog cov hlau tempered uas nyuaj dua thiab muaj zog dua, tab sis tseem muaj kev ywj pheej thiab kev tawv txaus.
Carburizing - Case hardening
Kev ua kom cov hlau tawv yog cov txheej txheem uas ua rau cov hlau raug cov pa roj carbon kom tawv thaum cov hlau raug cua sov. Kev ntxiv cov pa roj carbon rau saum npoo ntawm cov hlau hloov cov tshuaj lom neeg kom nws teb tau zoo dua rau kev kho cua sov thaum tseem ua kom cov hlau mos dua thiab tawv. Cov pa roj carbon tsuas yog nqus tau rau ntawm cov saw hlau uas raug nthuav tawm, thiab qhov tob ntawm cov pa roj carbon nkag mus rau hauv yog sib npaug rau lub sijhawm siv hauv lub cub tawg, yog li ntawd hu ua kev ua kom tawv. Kev ua kom tawv ua rau cov hlau tawv dua li lwm txoj kev ua kom tawv, tab sis kev ua kom tawv tob tuaj yeem siv sijhawm ntau dua thiab kim heev.
Kev kho kom tawv tawv
Zoo ib yam li kev ua kom tawv, nws yuav tsum muaj txheej txheem ua kom sov thiab tom qab ntawd quenching, tab sis kev siv cua sov yog ua tiav raws li kev tswj hwm los ntawm kev ua kom tawv (lub zog sib nqus). Kev ua kom tawv feem ntau yog ua tiav raws li txheej txheem thib ob ntxiv rau kev ua kom tawv. Cov txheej txheem tswj hwm kev ua kom tawv txwv qhov tob thiab tus qauv ntawm kev hloov pauv tawv. Kev ua kom tawv yog siv los ua kom tawv ib feem ntawm ib feem, tsis yog tag nrho ib feem.
Txawm hais tias kev kho cua sov yog ib txoj hauv kev zoo thiab tseem ceeb los txhim kho qhov zoo ntawm cov saw hlau sib txuas, kev tsim cov saw hlau zoo, kav ntev yuav tsum muaj ntau lwm yam txheej txheem tsim khoom xws li khoov thiab vuam.
Lub sijhawm tshaj tawm: Lub Peb Hlis-31-2023
