A.火焰淬火 B.感應(yīng)淬火 C.接觸電阻加熱淬火 D.鹽浴爐加熱淬火
A.4HRC B.3HRC C.2HRC D.1HRC
A.調(diào)質(zhì)處理 B.低溫回火 C.中溫回火 D.高溫回火