短語詞組短語tempered -martensite embrittlement 回火馬氏體脆性tempered martensite embrittlement [機(jī)]回火馬氏體脆化acicular tempered martensite 針狀回火馬氏體tempered martensite structure 回韌麻田散組織over tempered martensite 過度回火馬氏體self tempered martensite steel 自回火馬氏體鋼martensite tempered content 馬氏體回火 返回 tempered martensite