4Cr2Mn2Mo模具钢淬火工艺研究  

Study on Quenching Process of 4Cr2Mn2Mo Die Steel

作　　者：张丽娜 王长春[1] 解福祥[1] 鲍文科 ZHANG Li'na;WANG Changchun;XIE Fuxiang;BAO Wenke(School of Electromechanical and Vehicle Engineering,Weifang University,Weifang 261061,China)

机构地区：[1]潍坊学院机电与车辆工程学院,山东潍坊261061

出　　处：《热加工工艺》2022年第6期134-136,141,共4页Hot Working Technology

基　　金：山东省自然科学基金项目(ZR2019BEE060);潍坊学院博士科研基金项目(2017BS12,2018BS10)。

摘　　要：采用OM、拉伸试验、硬度测试等研究了不同温度和保温时间淬火对4Cr2Mn2Mo模具钢组织与力学性能的影响。对4Cr2Mn2Mo试验钢进行(400~560)℃×2 h,480℃×(0.5~3) h的淬火试验。结果表明:随着淬火温度的升高,试验钢组织中板条马氏体先增加后减少,针状马氏体先减少后增加。480℃淬火,组织中板条马氏体的含量最多,针状马氏体最少。480℃×2 h淬火试验钢的伸长率为7.4%,明显高于其他淬火试验钢的伸长率,同时,强度也处在较高水平,480℃×2 h为4Cr2Mn2Mo试验钢的最佳淬火工艺。The effects of different temperatures and holding time quenching on the microstructure and mechanical properties of 4Cr2Mn2Mo die steel were studied by OM, tensile test and hardness test. The quenching test of test steels(400-560) ℃×2 h,480 ℃×(0.5-3) h was carried out. The results show that with the increase of quenching temperature, in the test steel, the slab martensite increases first and then decreases, and the acicular martensite decreases first and then increases.480℃ quenching, the content of lath martensite is the most, the needle martensite is the least. The elongation of 480 ℃×2 h quenching test steel is 7.4%, which is obviously higher than that of other quenching test steel. At the same time, the intensity is at a higher level. The optimum quenching process of the test steel is 480 ℃×2 h.

关 键 词：4Cr2Mn2Mo钢 淬火 组织 力学性能 

分 类 号：TG161[金属学及工艺—热处理]