摘要
对“真空感应+保护气氛电渣重熔”工艺制备的退火态GCr4Mo4V钢分别在1090、1120、1150℃保温30、60、120 min油淬,并随后连续进行3次回火处理,借助UMT TriboLab摩擦磨损试验机对其开展干摩擦磨损试验,并对其显微组织、表面硬度、磨痕形貌及磨损率的变化规律进行分析,以探究淬火工艺对GCr4Mo4V钢显微组织及干摩擦磨损特性的影响规律。结果表明,1150℃淬火温度是GCr4Mo4V钢晶粒急剧长大的临界温度,淬火温度的提高促进了大颗粒碳化物的溶解,保温时间的延长更有利于回火后碳化物的弥散化分布,淬火温度比保温时间对大颗粒碳化物的细化作用影响更大,而晶粒组织与碳化物的细化与弥散化对GCr4Mo4V钢耐磨性提升有积极作用。
Annealed GCr4Mo4V steel prepared by the process of “VIM+ESR” was oil quenched at 1090,1120 and 1150 ℃ for 30,60 and 120 min respectively,and then tempered three times continuously.The dry wear test was carried out on UMT TriboLab wear tester,and the evolution of its microstructure,surface hardness,wear scratch morphology and wear rate were analyzed,and the influence of quenching process on the microstructure and dry wear characteristics of the GCr4Mo4V steel were investigated.The results show that the quenching temperature of 1150 ℃ is the critical temperature for the rapid growth of grains.The increase of quenching temperature promotes the dissolution of large particle carbides.The prolongation of holding time is more conducive to the dispersion distribution of carbides after tempering.The quenching temperature has a greater effect on the refinement of large particle carbides than the holding time.The refinement and dispersion of grain structure and carbides have a positive effect on the improvement of wear resistance of the GCr4Mo4V steel.
作者
崔毅
崔继红
王艳
张雲飞
俞峰
赵英利
曹文全
Cui Yi;Cui Jihong;Wang Yan;Zhang Yunfei;Yu Feng;Zhao Yingli;Cao Wenquan(Institute for Special Steels,Central Iron and Steel Research Institute Company Limited,Beijing 100081,China;HBIS Materials Technology Research Institute,Shijiazhuang Hebei 052165,China;Beijing Research Institute of Mechanical&Electrical Technology Co.,Ltd.,CAM,Beijing 100083,China;HBIS Company Limited,Shijiazhuang Hebei 050023,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第9期23-29,共7页
Heat Treatment of Metals
基金
河北省重点研发计(20311006D)
河北省重大科技成果转化专项(22281007Z)。
关键词
淬火
高温轴承钢
显微组织
耐磨性
quenching
high temperature bearing steel
microstructure
wear resistance
