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℃.
作者
李东方
杨海波
黄林波
林钰珍
巫少龙
徐文俊
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)
出处
《机械工程材料》
CAS
CSCD
北大核心
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)
关键词
电脉冲淬火
电脉冲回火
35CRMO钢
显微组织
强塑性
electrical pulse quenching
electrical pulse tempering
35CrMo steel
microstructure
strength-ductility balance
