钛合金的渗氮工艺及机理研究进展  

Research Progress on Nitriding Technology and Mechanism of Titanium Alloys

作　　者：李聪[1] 莫帆 肖辉 陈汪林 LI Cong;MO Fan;XIAO Hui;CHEN Wanglin(Changsha University of Science and Technology,Changsha 410114,China;Qingyuan Yuebo Technology Co.,Ltd.,Guangdong Qingyuan 511500,China;Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]长沙理工大学,长沙410114 [2]清远市粤博科技有限公司,广东清远511500 [3]广东工业大学,广州510006

出　　处：《表面技术》2024年第19期14-26,共13页Surface Technology

基　　金：湖南省自然科学基金(2022JJ30597);广东省自然科学基金(2022A1515010210)。

摘　　要：对钛合金的气体渗氮、真空渗氮、离子渗氮、激光渗氮、稀土催化渗氮、复合渗氮等工艺的研究现状进行了全面梳理,重点阐述了渗氮温度、渗氮时间、气压、氮含量、间歇周期、渗氮气氛、激光功率、扫描速度等工艺参数对钛合金渗氮层组织和性能的影响,详细分析了渗氮层显微组织的演变规律和性能提升的机理。最后,介绍了目前发展的新型钛合金渗氮工艺,总结了实际生产中钛合金各渗氮工艺的优缺点以及应用中存在的问题,并对未来钛合金渗氮工艺的发展方向进行了一定的展望,以期为钛合金渗氮层性能优化与表面强化技术的发展提供有益借鉴。Titanium alloy has low density,high strength ratio,high corrosion resistance,high temperature resistance and other excellent properties,and has been widely used in aerospace,marine engineering,energy chemical industry and biomedical fields.However,the surface of titanium alloy has defects such as low hardness,poor wear resistance and insufficient fatigue resistance,which seriously limits its application range and field expansion.Therefore,the surface strengthening of titanium alloy has become one of the research hotspots.In recent years,many surface treatment technologies have been proposed for titanium alloys,including thermal spraying,cold spraying,electric spark strengthening,carburizing,CVD,PVD,ion implantation,laser alloying,etc.The coating prepared by thermal spraying has poor bonding strength with the substrate,and the cold spraying is likely to produce severe plastic deformation.The operation of EDM strengthening is simple,but it is likely to produce micro-cracks.Ion implantation is accurate and controllable,but the equipment cost is high.Each surface treatment technology has its own unique advantages and disadvantages and scope of application.When choosing surface treatment technology,it is necessary to make trade-offs and choices according to actual needs and conditions.Among many surface treatments,nitriding treatment has the advantages of fast penetration,small workpiece deformation,high chemical stability,simple process,etc.,and can also be compounded with other treatment technologies,which is an effective method to improve the surface hardness,wear resistance,corrosion resistance and other properties of titanium alloys.Researchers have conducted a lot of research on this.However,the research on nitriding process of titanium alloy is relatively scattered and lacks a systematic and detailed summary.Based on this,the research status of gas nitriding,vacuum nitriding,ion nitriding,laser nitriding,rare earth catalytic nitriding,composite nitriding and other processes of titanium alloy were comprehensivel

关 键 词：钛合金 渗氮工艺 渗氮层 工艺参数 显微组织 性能提升 

分 类 号：TG156.82[金属学及工艺—热处理]