Yam khoom twg muaj cov iav hnav tsis zoo

Yuav tsum hnav tsis kam, thiab qhov ceev yuav tsum siab.
Kev kub ceev nruab nrab thauj khoom, tsis muaj kev cuam tshuam hnyav - alloy quenched thiab tempered steel: 40Cr, 40MnB, 40Mn VB
Kev kub ceev, nruab nrab load, cuam tshuam - alloy carburizing steel: 20Cr, 20Mn2B, 20MnVB, 20CrMnTi
Nws yog pheej yig dua los siv 40Cr lossis 20Cr.
Yog tias qhov ceev tsis siab heev, cov pa roj carbon zoo tuaj yeem siv tau: 45
Gears yog qhov tseem ceeb, thiab cam khwb cia hlau feem ntau tsis siv rau cov hniav iav.