不同离子渗氮时间对Ti60合金表面性能的影响  

Effect of Different Plasma Nitriding Time on Surface Properties of Ti60 Alloy

作　　者：信灿尧 刘靓 闫钊鸣 薛勇[1] XIN Canyao;LIU Liang;YAN Zhaoming;XUE Yong(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学材料科学与工程学院,太原030051

出　　处：《精密成形工程》2025年第4期87-95,共9页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(52075501)。

摘　　要：目的探究Ti60合金在进行双辉离子渗氮时改变时间引起的表面性能变化,以提高表面耐磨性,延长使用寿命。方法使用高4.8 m的双辉离子渗氮设备在900℃条件下分别进行8、12和16 h的渗氮处理,结合光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)、往复摩擦磨损试验及硬度测量等手段,分析了双辉离子渗氮时间对Ti60合金的表面形貌、相组成及性能变化的影响。结果双辉离子渗氮8、12、16 h后的硬度值分别660.5HV、737.85HV、935.57HV,渗氮层厚度分别为0、(8±1)、(12±2)μm,摩擦磨损的直径分别为(68±5)、(62±4)、(53±6)μm,粗糙度分别为0.28、0.27、1.97μm,摩擦因数分别为0.495、0.524、0.5。结论随着渗氮时间的延长,Ti60合金表面渗氮层逐渐增厚,表面成分由以TiN相为主导(8 h)逐步过渡为以Ti_(2)N相为主导(16 h),从而提高了Ti60合金的各项表面性能。因此,渗氮时间16 h为最佳的工艺参数。The work aims to investigate the change of surface properties caused by the change of time during dual-glow plasma nitriding of Ti60 alloy,so as to improve the surface wear resistance and extend the service life of components.Using a 4.8 m dual-glow plasma nitriding equipment,Ti60 alloy samples were nitrided at 900℃for 8,12,and 16 h.The surface morphology,phase composition,and performance changes of Ti60 alloy during nitriding were analyzed using optical microscopy(OM),scanning electron microscopy(SEM),X-ray diffraction(XRD),reciprocating friction wear tests,and hardness measurements.After 8,12,and 16 h of dual-glow plasma nitriding,the hardness values were 660.5HV,737.85HV,and 935.57HV,respectively.The nitrided layer thicknesses were 0,(8±1),and(12±2)μm,respectively.The wear diameter decreased to(68±5),(62±4),and(53±6)μm,respectively.Surface roughness values were 0.28,0.27,and 1.97μm,and the friction coefficients were 0.495,0.524,and 0.5,respectively.With the extension of nitriding time,Ti60 alloy's surface gradually formed TiN phase,with the TiN phase dominating at 8 hours and transitioning to Ti_(2)N phase at 16 hours,significantly improving the surface performance of Ti60 alloy.Therefore,16 hours of nitriding time is the optimal process parameter.

关 键 词：TI60 渗氮时间 表面性能 氮化层 微观组织 

分 类 号：TG178[金属学及工艺—金属表面处理]