Dab tsi yog qhov cuam tshuam ntawm cov qauv qub sib txawv ntawm cov hlau ntawm khaus khaus?

Qhov nrawm uas ferrite thiab cementite hloov pauv mus rau austenite nyob ntawm qhov ntsuas kub, qhov sib xyaw ntawm cov hlau, thiab cov qauv qub.

Kev tsim tus nqi ntawm cov chaw tshiab austenite thiab qhov kev loj hlob ntawm cov chaw no tau txiav txim siab los ntawm tus qauv qub. Qhov sib cais ntau dua ntawm cov qauv qub, qhov sib txawv me dua ntawm cov ferrite thiab cov cementite hais, yog li cov austenite nucleus tau rhaub. Kev yug thiab kev loj hlob sai dua. Txij li cov ferrite-cementite sib xyaw ua ke austenite ntawm tus ciam ntawm kev faib dav hlau ntawm cov theem no, qhov ua tau zoo dua qub, cov dav dav faib dav dua (cov tshuaj tiv thaiv tau zoo) ntawm theem. Qhov sib cais ntawm cov ntaub so ntswg qub yog qhov luv dua lub sijhawm xav tau rau kev sib xyaw kom zoo ib yam thaum cov khoom sib tov ua kom sov. Yog li ntawd, thawj lub xeev tus qauv tseem ceeb heev rau induction hardening.

Hauv lub xeev ib txwm ua los yog ua kom sov, cov qauv qub ntawm hypoeutectoid hlau yog pearlite thiab dawb ferrite, thiab nws qhov kev ua kom nrawm dua qeeb dua li ntawm quenched thiab tempered sorbite (dispersed ferrite cementite sib tov) Yuav tsum tau ua kom tiav, ua kom zoo dua qub lossis ua kom cov hlau yuav tsum tau tua. thiab tempered ntawm qhov kub quenching siab dua li quenched thiab tempered hlau.

Lwm txoj hauv kev kom tau txais cov qauv sorbite yog txhawm rau tiv thaiv cov hlau los ntawm kev tsim kom muaj kev nyuab siab loj thaum lub sij hawm induction quenching. Raws li txhua tus paub, qhov loj ntawm kev nyuab siab nyob hauv cov hlau quenched, ntawm lwm yam, tseem nyob ntawm qhov ntsuas kub. Qhov siab dua qhov ntsuas kub, qhov ntau dua qhov kev nyuab siab nyob hauv cov hlau quenched. Qhov ntsuas kub xav tau rau qhov ua kom sov thiab ua kom sov yog qhov qis tshaj, yog li qhov kev nyuab siab tom qab quenching kuj tseem tsawg tshaj plaws, txo qhov kev pheej hmoo ntawm kev tawg thiab tawg. Kev kho kom sov thiab ua kom sov tuaj yeem txhim kho lub zog ntawm lub plawv, yog li nws yog qhov tsim nyog rau ntu tseem ceeb uas xav tau cov cuab yeej siv siab.