冷作模具钢Cr12在不同热处理工艺下的微观组织与力学性能的研究  

Study on Microstructure and Mechanical Properties of Cold Working Die Steel Cr12 under Different Heat Treatment Processes

作　　者：廖婷婷 杨何 刘浩茏 陈飞 周盼 赵鑫欣 丁义超[1] LIAO Tingting;YANG He;LIU Haolong;CHEN Fei;ZHOU Pan;ZHAO Xinxin;DING Yichao(School of Materials and Environmental Engineering,Chengdu Technological University,Chengdu 611730,China;Panzhihua Shuigang Hongfa Mining Co.,Ltd.,Panzhihua 617112,China)

机构地区：[1]成都工业学院材料与环境工程学院,成都611730 [2]攀枝花水钢红发矿业有限公司,四川攀枝花617112

出　　处：《成都工业学院学报》2024年第1期1-4,17,共5页Journal of Chengdu Technological University

基　　金：四川省科技计划重大研发项目“高钛球团矿绿色高性能制造技术和关键装备研发及应用示范”。

摘　　要：为探究不同热处理工艺下,冷作模具钢Cr12的微观组织与力学性能的变化,以钢光板Cr12为原材料,通过箱式电阻炉进行高温退火(860℃),淬火(1020,950℃)和回火(210,520℃),制得不同热处理样品后,采用X射线衍射仪、洛氏硬度和金相显微镜等进行材料学分析检测。结果表明,最优的热处理方案为950℃淬火+520℃回火,此时金相显微组织是回火索氏体和碳化物,晶粒细小且分布均匀,其硬度和冲击韧性分别为48.4 HRC和25.1 J。In order to explore the changes of microstructure and mechanical properties of cold working die steel Cr12 under different heat treatment processes,using steel plate Cr12 as raw material,different heat treatment samples were prepared by high temperature annealing(860℃),quenching(1020/950℃)and tempering(210/520℃)through a box resistance furnace.The materials of these samples were analyzed by X-ray diffractometer,rockwell hardness and metallographic microscope.The results show that the optimal heat treatment scheme is 950℃quenching+520℃tempering.In this case,the microstructure is tempered sorbite and carbide,the grains are fine and evenly distributed,and the hardness and impact toughness are 48.4 HRC and 25.1 J,respectively.

关 键 词：热处理 CR12模具钢 硬度 金相 

分 类 号：TB331[一般工业技术—材料科学与工程]