Ni含量对淬火态含Cu时效钢显微组织的影响  

Effect of Ni content on microstructure of quenched Cu-bearing age-hardening steel

作　　者：刘欢 柴锋[2] 丁汉林 张正延[2] 罗小兵[2] 卢云[1] 朱国辉[1] LIU Huan;CHAI Feng;DING Han-lin;ZHANG Zheng-yan;LUO Xiao-bing;LU Yun;ZHU Guo-hui(School of Materials and Science and Engineering,Anhui University of Technology,Ma'anshan 243002,China;Department of Structural Steels,Central Iron and Steel Research Institute,Beijing 100081,China;School of Iron and Steel,Soochow University,Suzhou 215006,China)

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]钢铁研究总院工程用钢研究所,北京100081 [3]苏州大学沙钢钢铁学院,江苏苏州215006

出　　处：《材料热处理学报》2020年第6期128-135,共8页Transactions of Materials and Heat Treatment

基　　金：国家重点研发计划项目(2017YFB0304501)。

摘　　要：采用扫描电镜、透射电镜和电子背散射衍射等研究了Ni含量对淬火态含Cu时效钢显微组织和精细结构的影响。结果表明,随着Ni含量增加,含Cu时效钢显微组织由贝氏体组织逐渐向马氏体组织转变,显微硬度增加;原奥氏体晶粒尺寸随Ni含量增加略有增加,但马氏体板条宽度略有减小,马氏体变体与原奥氏体晶粒取向关系符合K-S关系。Effect of Ni content on microstructure and fine structure of quenched Cu-bearing age-hardening steel was investigated by means of scanning electron microscopy,transmission electron microscopy and electron backscattering diffraction technique.The results show that with the increase of Ni content,the microstructure of the steel gradually changes from bainite structure to martensite structure,and the microhardness increases.The grain size of the prior austenite increases slightly with the increase of Ni content,but the martensite lath width decreases slightly,and the relationship between martensite variant and the grain orientation of the prior austenite conforms to the K-S relationship.

关 键 词：含铜时效钢 Ni含量 显微组织 亚结构 原奥晶粒 

分 类 号：TG142.3[一般工业技术—材料科学与工程]