基于双辉技术的气门盘锥面TiN涂层制备和高温摩擦行为  

Preparation and high-temperature friction behavior of TiN coating on valve disc cone surface based on dual glow technology

作　　者：罗长增 曾笑笑 魏东博[4] 李旭聪 陈月春 林慕尧 张平则[4] Luo Changzeng;Zeng Xiaoxiao;Wei Dongbo;Li Xucong;Chen Yuechun;Lin Muyao;Zhang Pingze(Weichai Power Co.,Ltd.,Weifang Shandong 261061,China;State Key Laboratory of Engine and Powertrain System,Weifang Shandong 261061,China;School of Automotive Studies,Tongji University,Shanghai 201804,China;College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 211106,China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261061 [2]内燃机与动力系统全国重点实验室,山东潍坊261061 [3]同济大学汽车学院,上海201804 [4]南京航空航天大学材料与科学技术学院,江苏南京211106

出　　处：《金属热处理》2024年第7期195-199,共5页Heat Treatment of Metals

基　　金：内燃机与动力系统全国重点实验室开放课题基金(skleps-sq-2023-080)。

摘　　要：利用双层辉光等离子表面冶金技术在NCF3015气门合金钢上制备TiN涂层,通过SEM、EDS、XRD、显微硬度计和高温摩擦磨损试验机研究涂层的微观结构形貌、硬度和高温耐磨性。结果表明:TiN涂层以岛状方式均匀生长,表面结构致密;涂层表面平均硬度可达1265.2 HV0.05;在5 N与10 N载荷下,涂层的比磨损率较气门基体分别降低79.3%、79.7%,是高温苛刻条件下气门表面防护的理想材料,可显著提高气门在发动机中的服役寿命。TiN coatings were prepared on NCF3015 valve alloy steel using double-layer glow plasma surface metallurgy technology.The microstructure,hardness and high-temperature wear resistance of the coatings were studied by SEM,EDS,XRD,microhardness tester and high-temperature friction and wear tester.The results show that the TiN coating grows uniformly in an island-like manner and has a dense surface structure.The average surface hardness of the coating can reach 1265.2 HV0.05.Under 5 N and 10 N loads,the specific wear rate of the coating is reduced by 79.3% and 79.7% compared to the valve substrate,respectively.It is an ideal material for valve surface protection under high temperature and harsh conditions,and can significantly improve the service life of valves in engines.

关 键 词：双层辉光等离子表面冶金技术 TIN涂层 硬度 高温耐磨性 表面防护 

分 类 号：TG178[金属学及工艺—金属表面处理]