激光加热过程中奥氏体形成的转变  

The Austenized Transformation in Laser Heating Processing

作　　者：朱祖昌[1] 王维荣[1] 俞少罗[1] 

机构地区：[1]上海工程技术大学测试中心

出　　处：《中国激光》1994年第10期846-851,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金

摘　　要：应用ＳＥＭ分析方法比较详细地研究了２０，４５，Ｔ１０和铸铁在激光热处理中奥氏体形成的转变，着重研究了奥氏体的形核位置，并讨论了激光加热条件下Ａｃ１，Ａｃ３转变点的确定。对Ｆｅ－Ｃ合金，Ａｃ１＝Ａ１＝７２７℃，对一般亚共析钢Ａｃ３＝１３６０３．９（ｌｎ０．２２ｄ／ξ２ｖ）－１。The austenized transformation of carbon steels of 20, 45 and T10 as well as castiron of HT200 has been investigated at some length with SEM analyses. We put stress uponstudying the sites of austenitic nucleation and discussing the determination of transformationpoints, Acl and Ac3, of materials in laser heating. For Fe-C alloys, Ac1=A1 = 727 ℃, andfor hypoeutectoid steels, Ac3 = 1 3603. 9 × (1n 0. 22 d/ξ-2v)-1.

关 键 词：奥氏体成形 激光加热 奥氏体 

分 类 号：TG151.1[金属学及工艺—热处理]