摘要
对SiMnCr试验用钢,分别进行了淬火、等温淬火和空冷处理,并分别利用金相显微镜、扫描电子显微镜和透射电子显微镜进行了显微组织观察,测定了CCT曲线.淬火态下获得板条马氏体和其间的残余奥氏体薄膜组织,等温淬火得到准贝氏体组织,锻造空冷状态下得到以板条马氏体为主含贝氏体和少量位于板条间界的残余奥氏体薄膜复合组织,经300℃回火,无渗碳体析出.
The microstructure characteristics of SiMnCr system high strength steel have been investigated by using optical microscope,scaning (SEM) and transmission(TEM) electron microscope under the different process conditions, such as forging followed,tempering,quenching and isothermalizing.The CCT diagram and the mechanical properties of the steel have been tested.The experiment shows that a composite structure consisting of the dominant lath martensite,a little part of bainite and retained austernite under forging,metabainite structure under the isothermalizing and the lath martensite structure with a little films of retained austernite under quenching are observed. No cementite precipitation occurs under tempering at as high as 300℃.
出处
《天津理工学院学报》
2002年第4期19-23,共5页
Journal of Tianjin Institute of Technology
基金
河北省自然科学基金资助项目(599023)
天津市重点科技攻关项目(993104211)
