淬火温度对Cr5MoVNi钢组织和性能的影响  

Effect of quenching temperature on microstructure and properties of Cr5MoVNi steel

作　　者：王世凯 王睿 康燕[2] 于志强 闫志杰 Wang Shikai;Wang Rui;Kang Yan;Yu Zhiqiang;Yan Zhijie(Shanxi Coal Mine Machinery Manufacturing Co.,Ltd.,Taiyuan Shanxi 030031,China;School of Materials Science and Engineering,North University of China,Taiyuan Shanxi 030051,China)

机构地区：[1]山西煤矿机械制造股份有限公司,山西太原030031 [2]中北大学材料科学与工程学院,山西太原030051

出　　处：《金属热处理》2022年第9期125-130,共6页Heat Treatment of Metals

基　　金：国家自然科学基金(52071300,51904278);中央引导地方科技发展专项(YDZX20191400004587,YDZJSX2021B020,YDZJSX2021C007);浙江省重大科技专项(2020C01131);山西省自然科学基金(201801D121105)。

摘　　要：为了研究淬火温度对Cr5MoVNi钢组织和性能的影响,采用了1000、1050、1100、1150℃淬火、230℃回火的热处理工艺。通过光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)及压缩试验等方法研究了不同淬火温度下的微观组织和力学性能。研究发现,随着淬火温度升高,试验钢基体中的残留奥氏体明显增多,甚至转变为单一的残留奥氏体;试验钢的硬度单调降低;冲击吸收能量先升高后降低,在1100℃达到最大值20.1 J;压缩变形过程中,残留奥氏体发生TRIP效应,是压缩应变超过35%的原因所在。To investigate the effect of quenching temperature on microstructure and properties of Cr5 MoVNi steel,the tested steel was quenched at 1000,1050,1100 and 1150℃respectively,and then tempered at 230℃.Optical microscope(OM),scanning electron microscope(SEM),transition electron microscope(TEM),X-ray diffraction(XRD)and compressive tests were employed to investigate the microstructure and mechanical properties of the tested steel.The results indicate that,with the increase of quenching temperature,the retained austenite content in the matrix of the steel increases significantly and even reaches to 100%retained austenite;the hardness decreases monotonously,and the impact absorbed energy increases to the peak value of 20.1 J when quenched at 1100℃,and then decreases with further increase of quenching temperature.TRIP effect occurs in the retained austenite during compressive deformation,that is the reason why the compressive strain exceeds 35%.

关 键 词：高碳Cr5MoVNi钢 淬火-回火 显微组织 力学性能 碳化物 

分 类 号：TG142.1[一般工业技术—材料科学与工程]