Cov pa roj carbon yog lub hauv paus tseem ceeb ntawm cov khoom siv hlau, yog li cov khoom siv hlau kuj tseem tuaj yeem raug hu ua hlau-carbon cov hlau. Lub luag haujlwm tseem ceeb ntawm cov pa roj carbon hlau yog:
Tsim cov qauv kev daws teeb meem txhawm rau txhim kho lub zog ntawm cov hlau, xws li ferrite thiab austenite cov qauv, txhua yam uas tau yaj hauv cov pa roj carbon;
2. Kev tsim cov qauv carbide tuaj yeem txhim kho qhov nyuaj thiab hnav tsis kam ntawm cov hlau. Piv txwv li, cementite, Fe3C, yog cov qauv carbide.
Yog li ntawd, hauv cov hlau, ntau dua cov ntsiab lus carbon, ntau dua lub zog thiab tawv ntawm cov hlau, tab sis cov yas thiab tawv tawv kuj tseem yuav txo qis. Ntawm qhov tsis sib xws, qis dua cov ntsiab lus carbon, ntau dua cov yas thiab tawv ntawm cov hlau, thiab nws lub zog. , Hardness yuav txo raws li.
Yog li ntawd, qib ntawm cov ntsiab lus carbon txiav txim siab siv cov hlau: cov pa roj carbon tsawg (cov ntsiab lus carbon< 0.25%),="" feem="" ntau="" siv="" los="" ua="" cov="" ntaub="" ntawv="" thiab="" cov="" khoom="" ntim="" khoom;="" cov="" pa="" roj="" carbon="" nruab="" nrab="" (cov="" ntsiab="" lus="">< 0.6%),="" feem="" ntau="" siv="" ua="" cov="" khoom="" siv="" kho="" tshuab;="" cov="" pa="" roj="" carbon="" siab="" (cov="" ntsiab="" lus="" carbon=""> 0.7%), feem ntau siv los ua cov cuab yeej, riam thiab pwm.
