分级淬火对高铬铸铁轧辊组织的影响  

Effect of step quenching process on microstructure of high-Cr cast iron roll

作　　者：张博涵 李浩楠 高鹏冲 乔桂英[3] 刘杰兵 肖福仁[1,2] Zhang Bohan;Li Haonan;Gao Pengchong;Qiao Guiying;Liu Jiebing;Xiao Furen(Key Lab of Metastable Materials Science&Technology,College of Materials Science and Engineering,Yanshan University,Qinhuangdao Hebei 066004,China;Hebei Key Lab for Optimizing Metal Product Technology and Performance,College of Materials Science and Engineering,Yanshan University,Qinhuangdao Hebei 066004,China;Key Lab of Applied Chemistry of Hebei Province,School of Environment and Chemical Engineering,Yanshan University,Qinhuangdao Hebei 066004,China;Hebei Technology Innovation Centre for Roller Green Manufacturing,Xingtai Delong Machinery&Mill Roll Co.,Ltd.,Xingtai Hebei 054009,China)

机构地区：[1]燕山大学材料科学与工程学院亚稳材料科学与制备技术国家重点实验室,河北秦皇岛066004 [2]燕山大学材料科学与工程学院河北省金属产品工艺与性能优化重点实验室,河北秦皇岛066004 [3]燕山大学环境与化学工程学院河北省应用化学重点实验室,河北秦皇岛066004 [4]邢台德龙机械轧辊有限公司河北省轧辊绿色制造技术创新中心,河北邢台054009

出　　处：《金属热处理》2022年第7期15-20,共6页Heat Treatment of Metals

基　　金：国家自然科学基金面上项目(51971198);河北省自然科学基金高端钢铁冶金联合研究基金(E2019203381)。

摘　　要：采用LINSEIS L78膨胀仪模拟了高铬铸铁轧辊的分级淬火冷却过程,采用膨胀法、光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)等方法研究了分级淬火温度对Ms点及室温组织和硬度的影响。结果表明,分级淬火对淬火冷却过程发生的相变影响不大;与直接淬火相比,分级淬火降低了Ms点,而且Ms点随分级淬火温度的降低而降低;当分级温度为560℃时,Ms点降低程度不大,淬火后硬度升高到62.1 HRC,而且经450~500℃回火后,硬度进一步升高到64.5 HRC。Step quenching process of high chromium cast iron roller was simulated by using LINSEIS L78 dilatometer.The effect of step quenching temperature on Ms point,microstructure and hardness was studied by means of thermal dilation,optical microscopy(OM),scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results show that the step quenching has little effect on the phase transformation during step quenching process,but it reduces the Ms point comparing with the direct quenching,and the Ms point decreases with the decrease of step quenching temperature.As the step quenching temperature is 560℃,the Ms point decreases a little,while the hardness increases to 62.1 HRC.Moreover,the hardness further increases to 64.5 HRC after tempering at 450-500℃.

关 键 词：轧辊 高铬铸铁 分级淬火 MS点 组织 

分 类 号：TG163[金属学及工艺—热处理]