GCr15SiMo钢中贝氏体含量对力学性能及干摩擦磨损性能的影响  

Effect of Bainite Content of GCr15SiMo Steel on Mechanical and Wear Properties

作　　者：毛艳珊 杜三明[1] 傅丽华 张永振[1] 高元安[2] 杨军[3] 魏超凡 付壁聪 MAO Yanshan;DU Sanming;FU Lihua;ZHANG Yongzhen;GAO Yuanan;YANG Jun;WEI Chaofan;FU Bicong(National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Henan University of Science and Technology,Henan Luoyang 471023,China;Luoyang Bearing Research Institute Co.,Ltd.,Henan Luoyang 471003,China;Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences Lanzhou,Lanzhou 730099,China)

机构地区：[1]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023 [2]洛阳轴承研究所股份有限公司,河南洛阳471003 [3]中国科学院兰州化学物理研究所,兰州730099

出　　处：《表面技术》2024年第7期48-56,共9页Surface Technology

基　　金：国家自然科学基金(52101083);中国博士后科学基金面上资助项目(2020M682316);河南省科技攻关项目(212102210117);固体润滑国家重点实验室开放课题(LSL-1916)。

摘　　要：目的通过控制等温淬火时间,在GCr15SiMo轴承钢中获得不同含量的贝氏体组织,并研究不同含量的贝氏体组织对材料力学性能和干摩擦磨损性能的影响。方法采用SEM、3D morphology、TEM、EDS、XRD、洛氏硬度计、冲击试验机等仪器观测GCr15SiMo轴承钢经不同等温淬火时间后的微观组织、物相含量和力学性能,并使用HL-R7000重载往复摩擦磨损试验机对不同贝氏体组织含量的试样进行摩擦磨损性能检测。结果当等温淬火时间由2 h延长至72 h时,材料中贝氏体的体积分数由14.5%增至83.5%。随着GCr15SiMo轴承钢材料中韧性贝氏体含量的增多、脆性马氏体含量的减少,其硬度逐渐降低,冲击功逐渐增大,磨损率呈现先降低再升高的趋势。材料的磨损机制主要为黏着磨损和磨粒磨损,随着等温淬火时间的延长,基于韧性贝氏体含量的增加,材料的磨粒磨损减弱、黏着磨损增强。结论在等温淬火温度为210℃、等温淬火时间为8 h时,材料中贝氏体的体积分数约为55.6%,马氏体的体积分数为33.2%,此时马氏体和贝氏体复相组织具有良好的强韧性匹配,材料的耐磨性能较好。Bearing is a key and indispensable part in mechanical equipment,which ensures the normal operation of the equipment.Bearings are widely used in real life,such as aerospace,heavy machinery,automobiles and ships,wind power generation,mining and agriculture,etc.However,as the demand for bearings increases and the working conditions become increasingly harsh,there are higher requirements for the performance and lifespan of bearings.Bainite bearing steel has been widely concerned because of its high strength,high toughness and low hydrogen embrittlement sensitivity.Obtaining the bainite microstructure of bearing steel requires isothermal quenching heat treatment,in which isothermal quenching temperature and isothermal quenching time are important parameters affecting the bainite structure and properties of bearing steel.The bainite microstructure with different contents can be obtained by adjusting the isothermal quenching time,thus affecting the strength,toughness and wear resistance of the material.The bainite content,in which the strength and toughness of bearing steel have a good match and enhance wear resistance,and the wear mechanism in the wear process are worthy of further study.The GCr15SiMo bearing steel was chosen as the research object in this work.The GCr15SiMo bearing steel with different bainite content was prepared.The microstructure and phase composition of the materials were analyzed,and the effects of the bainite content on the mechanical and wear properties were investigated.The microstructure change,phase content composition and mechanical properties of GCr15SiMo bearing steel after different isothermal quenching time were observed by scanning electron microscopy,3D morphology,transmission electron microscopy,field emission scanning electron microscope,X-ray diffraction,Rockwell hardness tester and impact tester.The friction and wear properties of samples with different bainite content were tested by HL-R7000 heavy-duty reciprocating friction and wear tester.The results showed that the content of

关 键 词：等温淬火工艺 贝氏体 力学性能 摩擦磨损 

分 类 号：TB333[一般工业技术—材料科学与工程]