摘要
对铸态40Cr6Mo4B2V钢进行920~1080℃不同温度的淬火试验,再进行440~620℃不同温度的回火处理,采用显微组织观察、硬度测试、摩擦磨损试验等方法确定40Cr6Mo4B2V钢的最佳热处理工艺。结果表明:铸态40Cr6Mo4B2V钢的显微组织由珠光体、残余奥氏体及网状的共晶硼碳化物组成。经过淬火后,40Cr6Mo4B2V钢中的硼碳化物断裂分解,1040℃淬火的40Cr6Mo4B2V钢硬度达到最大值61.5 HRC,再对其进行500℃回火处理后,40Cr6Mo4B2V钢的组织基体晶粒等轴化,共晶硼碳化物连接呈网状,其耐磨性最佳。
The as-cast 40Cr6Mo4B2V steel was quenched at 920-1080℃and then tempered at 440-620℃.The optimum heat treatment technology of 40Cr6Mo4B2V steel was determined by means of microstructure observation,hardness test and friction and wear test.The results show that the microstructure of as-cast 40Cr6Mo4B2V steel consists of pearlite,retained austenite and network eutectic boron carbide.After quenching,the boron carbide in 40Cr6Mo4B2V steel breaks down.The hardness of 40Cr6Mo4B2V steel quenched at 1040℃reaches the maximum value of 61.5 HRC.After tempering at 500℃,the matrix grain of 40Cr6Mo4B2V steel is equiaxed,and the eutectic boron carbide is connected in a network,so the wear resistance of 40Cr6Mo4B2V steel is the best.
作者
牛瑞利
王丽娟
NIU Ruili;WANG Lijuan(College of Mechanical and Electrical Engineering,Zhengzhou University of Industry Technology,Zhengzhou 451150,China;School of Electronic Engineering and Optoelectronic Technology,Nanjing University of Technology,Nanjing 210094,China)
出处
《热加工工艺》
北大核心
2021年第24期120-122,126,共4页
Hot Working Technology
基金
河南省重点研发与推广(科技攻关)项目(192102210224)
河南省科技攻关项目(182102210556)。
