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    曹海玲, 樊亚军, 张占领, 朱杰武, 柳永宁, 许雁. 热轧超高碳钢的显微组织与力学性能[J]. 机械工程材料, 2008, 32(1): 13-16.
    引用本文: 曹海玲, 樊亚军, 张占领, 朱杰武, 柳永宁, 许雁. 热轧超高碳钢的显微组织与力学性能[J]. 机械工程材料, 2008, 32(1): 13-16.
    shu
    CAO Hai-ling, FAN Ya-jun, ZHANG Zhan-ling, ZHU Jie-wu, LIU Yong-ning, XU Yan. Microstructure and Mechanical Properties of Hot-rolled Ultra-high Carbon Steel[J]. Materials and Mechanical Engineering, 2008, 32(1): 13-16.
    Citation: CAO Hai-ling, FAN Ya-jun, ZHANG Zhan-ling, ZHU Jie-wu, LIU Yong-ning, XU Yan. Microstructure and Mechanical Properties of Hot-rolled Ultra-high Carbon Steel[J]. Materials and Mechanical Engineering, 2008, 32(1): 13-16.
    shu

    热轧超高碳钢的显微组织与力学性能

    Microstructure and Mechanical Properties of Hot-rolled Ultra-high Carbon Steel

      摘要
    • 摘要: 对超高碳钢进行热轧预处理,得到组织细小、弥散分布的球化碳化物和部分片状珠光体,有效地增强了其后续球化效果;基于离异共析原理,采用不同的工艺球化处理热轧超高碳钢,并对其进行了扫描电镜分析和拉伸试验.结果表明：随奥氏体化温度升高碳化物大小和间距逐渐增大,保温时间延长也将增大碳化物颗粒的间距;球化超高碳钢显示出优异的室温拉伸性能,具有明显的屈服现象,强度和塑性均很好,850 ℃奥氏体化的超高碳钢屈服强度和抗拉强度分别为688 MPa和1 005 MPa,伸长率为16.7%.

       

      Abstract: Hot-rolling was applied to pretreated ultra-high carbon steel (UHCS).The obtained microstructure consisted of fine,spherical and dispersion-distributing carbides and partial lamellar pearlite,which effectively improved spheroidization of carbides.Different heat treatment technologies based on DET(divorced eutectoid transformation) were taken to spheroidize the hot-rolled UHCS.SEM observation shows that austenitizing state affected the spheroidization of carbides.Higher austenizating temperature or longer holding time of the ultra-high carbon steel increas particle spacing and size of carbides.Ambient tensile test indicat that the spheroidized steel reveal excellent mechanical properties,including obvious yielding phenomena with good strength and plasticity.The UHCS austenized at 850 ℃ show that σ0.2 and σb are 688 MPa and 1 005 MPa,respectively,together with extension rate of 16.7%.

       

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