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以40Cr、65Mn和T11A钢为例,采用光学显微镜、扫描电镜和透射电镜,较深入地研究了淬火温度对显微组织影响的规律,得出:随淬火加热温度的连续升高,依次形成隐针马氏体→混乱取向的细针状马氏体→纤维状马氏体→粗片马氏体+纤维状马氏体→更粗大的马氏体片+大量残余奥氏体.文中充分证实,中、高碳淬火钢在光学显微镜下显现出的纤维状马氏体同低磷淬火钢中的板条马氏体显著不同.此外还重点分析了中、高碳钢的高温淬火组织是全部孪晶型片状马氏体,没有板条马氏体。
Taking 40Cr, 65Mn and T11A steels as an example, the influence of quenching temperature on the microstructure was studied by using optical microscope, scanning electron microscope and transmission electron microscope. The results show that with the continuous increase of quenching temperature, Needle martensite → chaotic oriented fine needle-like martensite → Fibrous martensite → Rough martensite + Fibrous martensite → Coarser martensite sheet + A large number of residual austenite. , Medium and high carbon steel hardened steel under optical microscopy showed martensite martensite with low-phosphorus quenched steel martensite significantly different.In addition also focused on the analysis of high-temperature quenched carbon steel is all Twin-type sheet martensite, there is no lath martensite.