高频淬火功率对35CrMo钢表面组织和摩擦磨损性能的影响  

Effect of High-Frequency Quenching Power on Surface Microstructure and Friction and Wear Properties of 35CrMo Steel

作　　者：王璠 刘德涛 何闯 WANG Fan;LIU Detao;HE Chuang(Jiangsu Yuanfang Power Technology Co.,Ltd.,Changzhou 212021,China;School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou 213164,China)

机构地区：[1]江苏远方动力科技有限公司,常州212021 [2]常州大学机械与轨道交通学院,常州213164

出　　处：《机械工程材料》2024年第3期29-36,共8页Materials For Mechanical Engineering

摘　　要：采用高频淬火工艺对35CrMo钢进行不同功率(2.5,3.0,3.5,4.0,4.5 kW)的表面淬火,研究了淬火功率对35CrMo钢表面显微组织、硬度、摩擦磨损性能和磨损机理的影响。结果表明:当淬火功率为2.5 kW时,试验钢表面组织主要为珠光体,表面硬度最低,为532 HV,稳定摩擦因数为0.58,磨损率最大,为14.58μm^(3)·N^(-1)·mm^(-1);当淬火功率为3.0 kW时,表面组织主要为粒状贝氏体,表面硬度最高,为604 HV,稳定摩擦因数最小,为0.47,磨损率最小,为10.15μm^(3)·N^(-1)·mm^(-1);随着淬火功率的继续增加,粒状贝氏体逐渐向上贝氏体、下贝氏体和无碳贝氏体转变,表面硬度降低,摩擦因数和磨损率整体呈增大趋势。当淬火功率为2.5,3.0,3.5,4.0 kW时,磨损机理以磨粒磨损为主,并伴随着局部的黏着磨损和氧化磨损;当淬火功率为4.5 kW时,磨损机理以黏着磨损为主,并伴随着局部的磨粒磨损和氧化磨损。The surface quenching of 35CrMo steel was carried out by high-frequency quenching under different powers(2.5,3.0,3.5,4.0,4.5 kW).The effects of quenching power on the surface microstructure,hardness,friction and wear properties and wear mechanism of 35CrMo steel were studied.The results show that when the quenching power was 2.5 kW,the test steel surface was mainly composed of pearlite and had the lowest hardness of 532 HV,the stable friction factor of 0.58,and the largest wear rate of 14.58μm^(3)·N^(-1)·mm^(-1).When the quenching power was 3.0 kW,the surface was mainly composed of granular bainite and had the highest surface hardness of 604 HV,the lowest stable friction factor of 0.47 and the lowest wear rate of 10.15μm^(3)·N^(-1)·mm^(-1).With the continuous increasing of quenching power,granular bainite gradually transformed into upward bainite,lower bainite and carbon-free bainite,the surface hardness decreased,and the friction coefficient and wear rate increased as a whole.When the quenching power was 2.5,3.0,3.5,4.0 kW,the wear mechanism was mainly abrasive wear and accompanied by local adhesive wear and oxidation wear.When the quenching power was 4.5 kW,the wear mechanism was mainly adhesive wear and accompanied by local abrasive wear and oxidation wear.

关 键 词：高频淬火 35CRMO钢 显微组织 摩擦磨损性能 磨损机理 

分 类 号：TN249[电子电信—物理电子学] TG115.5[金属学及工艺—物理冶金]