A.高碳低合金 B.抗沖擊 C.耐熱性 D.抗拉性 E.易脆 F.易裂
A.6CrW2Si,4CrW2Si B.5CrMnMo C.5CrNiMo D.Cr12,Cr12MoV E.Cr12,9Mn2V F.9Mn2V,4Cr5W2VSi
A.調(diào)質(zhì) B.淬火 C.合理設(shè)計(jì)模具 D.加低溫回火 E.滲氮 F.退火