Martensitic kauj ruam quenching hauv qab Ms point

Martensitic graded quenching method hauv qab Ms point: Thaum lub da dej kub qis dua Ms ntawm lub workpiece steel thiab siab dua Mf, lub workpiece txias sai dua nyob rau hauv lub da dej, thiab tib yam li cov graded quenching tuaj yeem tau txais thaum qhov loj dua. Feem ntau siv rau qhov loj me me uas tsis muaj hardenability steel workpieces.