电脉冲调质处理对齿套用35CrMo钢显微组织和力学性能的影响  

Effect of Electrical Pulse Quenching and Tempering Treatment on Microstructure and Mechanical Properties of 35CrMo Steel for Gear Sleeve

作　　者：李东方[1] 杨海波[2] 黄林波 林钰珍[1] 巫少龙[1] 徐文俊[1] LI Dongfang;YANG Haibo;HUANG Linbo;LIN Yuzhen;WU Shaolong;XU Wenjun(College of Mechanical and Electrical Engineering,Quzhou College of Technology,Quzhou 324000,China;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;Zhejiang Wanliyang Co.,Ltd.,Jinhua 321042,China)

机构地区：[1]衢州职业技术学院机电工程学院,衢州324000 [2]北京科技大学机械工程学院,北京100083 [3]浙江万里扬股份有限公司,金华321042

出　　处：《机械工程材料》2019年第12期52-56,61,共6页Materials For Mechanical Engineering

基　　金：浙江省衢州市科技局计划项目(2017G13);国家重大科学仪器设备开发专项项目(2011YQ14014505)

摘　　要：在不同回火温度(550~640℃)、不同脉冲次数(1,2次)和脉冲持续时间(60~180ms)下对热轧态35CrMo钢分别进行传统淬火+传统回火、电脉冲淬火+传统回火、传统淬火+电脉冲回火处理,对比研究了处理后的显微组织和力学性能。结果表明:电脉冲淬火+550℃传统回火、传统淬火+1次电脉冲回火以及传统淬火+2次电脉冲60ms回火处理后,试验钢的组织与传统淬火+传统回火处理后的相似,均由马氏体和碳化物组成;随着回火温度的升高,电脉冲淬火+传统回火处理后的组织中出现层片状索氏体,试验钢的抗拉强度和硬度降低,伸长率增大;电脉冲淬火或回火均能提高试验钢的强塑性,电脉冲淬火+580℃传统回火处理后的强塑性最佳。Hot rolled 35 CrMo steel was treated by traditional quenching+traditional tempering,electrical pulse quenching+traditional tempering and traditional quenching+electrical pulse tempering at different tempering temperatures(550-640 ℃)and for different pulse times(1,2 times)and pulse duration(60-180 ms).The microstructures and mechanical properties after treatment were studied and compared.The results show that after electrical pulse quenching+traditional tempering at 550℃,traditional quenching+single electrical pulse tempering,and traditional quenching+two electrical pulse of 60 ms tempering treatment,the microstructures of the test steel were all similar to that after traditional quenching+traditional tempering;all were composed of martensite and carbides.With increasing tempering temperature,lamellar sorbite appeared in the structure after electrical pulse quenching+traditional tempering;the tensile strength and hardness of the test steel decreased,and the elongation increased.The electrical pulse quenching or tempering could improve the strength-ductility balance of the test steel,and the strength-ductility balance was the best after the electrical pulse quenching+traditional tempering at 580℃.

关 键 词：电脉冲淬火 电脉冲回火 35CRMO钢 显微组织 强塑性 

分 类 号：TG456.7[金属学及工艺—焊接]