摘要
为了改善40CrNiMoA钢表面耐磨性能,采用高频感应淬火对其表面进行热处理,研究高频感应淬火后不同冷却介质对其微观组织与性能的影响。结果表明:当淬火冷却介质为水和油时,40CrNiMoA钢高频感应淬火+回火后的组织主要为残留奥氏体和层片状回火马氏体;当淬火冷却介质为盐溶液时,其组织主要为针状回火马氏体,且回火马氏体更加细小、均匀,同时试样具有更高的表面硬度、抗拉强度和耐磨性能,但与原始试样相比,其塑性更低;油液、盐溶液淬火试样断裂形式为韧性断裂,而水淬试样断裂形式为脆性断裂。
In order to improve the wear resistance of 40CrNiMoA steel,its surface was heat-treated by high-frequency induction quenching,and the influence of different cooling media on its microstructure and properties after high-frequency induction quenching was studied.The results show that when the cooling medium is water or oil cooling,the microstructure of 40CrNiMoA steel after high-frequency induction quenching and tempering is mainly residual austenite and tempered martensite.When the cooling medium is a salt solution,its microstructure is mainly tempered martensite and the tempered martensite microstructure is finer and more uniform.At this time,the sample has higher hardness,tensile strength and wear resistance,but its plasticity is reduced compared with the original sample.The fracture forms of specimens quenched in oil and salt solution are ductile fracture,while those of specimens quenched in water are brittle fracture.
作者
罗杰
李祥
杨旭
韩佳龙
吴韦莉
LUO Jie;LI Xiang;YANG Xu;HAN Jialong;WU Weili(Guizhou Aerospace Seiko Manufacturing Co.,Ltd.,Zunyi 563000,Guizhou,China;Nanchang Hangkong University,School of Materials Science and Engineering,Nanchang 330063,Jiangxi,China)
基金
贵州航天精工制造有限公司与南昌航空大学合作课题(GK20210104)。
