热处理工艺对40CrNiMoA合金组织及力学性能的影响  

Effect of heat treatment process on the microstructure and mechanical properties of 40CrNiMoA steel

作　　者：李子健 贾丽敏[1,2] 韩鹏彪 梁小凯[3] 田燕 李昕悦[1] 王蕾 LI Zijian;JIA Limin;HAN Pengbiao;LIANG Xiaokai;TIAN Yan;LI Xinyue;WANG Lei(School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China;Hebei Key Laboratory of Material Near-Net Forming Technology,Shijiazhuang,Hebei 050018,China;Institute of Structural Steels,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050018 [2]河北省材料近净成形技术重点实验室,河北石家庄050018 [3]钢铁研究总院工程用钢研究所,北京100081

出　　处：《河北科技大学学报》2024年第1期67-73,共7页Journal of Hebei University of Science and Technology

基　　金：河北省重点研发项目(19211007D)。

摘　　要：为了提高矿用链轮耐磨性,延长其使用寿命,选取电渣离心铸造40CrNiMoA合金链轮件作为母材,研究热处理工艺对40CrNiMoA合金组织和力学性能的影响。采用正交试验法,研究不同热处理工艺对合金显微硬度、摩擦磨损及拉伸强度等力学性能的影响,并将测试结果进行极差分析和综合加权评分计算,得出最优热处理工艺参数,最后进行试验验证。结果表明,正交试验法得到的最优热处理工艺为880℃淬火0.5 h,600℃高温回火2 h,样品热处理后的组织主要为回火索氏体,维氏硬度为364 HV,抗拉强度为1166 MPa,磨损率为0.427×10^(-4)mm^(3)/(N·m);验证试验结果与正交试验分析结果相近,且热处理后的样品性能可达到使用要求。研究结果可为矿用链轮件热处理工艺提供理论依据,对有效解决链轮耐磨性和使用寿命问题具有参考价值。In order to improve the wear resistance and service life of mining sprockets,40CrNiMoA sprockets cast by centrifugal electroslag casting were selected as the base material to study the effects of heat treatment processes on microstructure and mechanical properties of the alloy.The effects of different heat treatment processes on the mechanical properties of the steel,such as microhardness,friction and wear,and tensile strength were investigated with the orthogonal experiment method.The test results were analyzed by range analysis and comprehensive weighted scoring calculation to obtain the optimal heat treatment process parameters.Finally,experimental verification was conducted.The results show that the optimal heat treatment process obtained by the orthogonal test method is quenching at 880 ℃ for 0.5 hours and high-temperature tempering at 600 ℃ for 2 hours.The microstructure of the sample after heat treatment is mainly tempered sorbite,with a Vickers hardness of 364 HV,a tensile strength of 1 166 MPa,and a wear rate of 0.427×10^(-4) mm^(3)/(N·m).The validation test results are similar to the orthogonal experimental analysis,and the sample performance after heat treatment can meet the usage requirements.Therefore,the research results can provide a theoretical basis for the heat treatment process of mining sprocket parts,and are of great significance for effectively solving the wear resistance and service life of sprockets.

关 键 词：黑色金属及其合金 40CrNiMoA合金 热处理工艺 显微组织 力学性能 正交试验 

分 类 号：TG406[金属学及工艺—焊接]