Ti6Al4V合金表面等离子渗镍研究  

Study on Double Glow Plasma Nickel Alloying Process for Ti6Al4V Alloy

作　　者：范莹[1] 王小峰[1] 王振霞[1] 贺志勇[1] 

机构地区：[1]太原理工大学表面工程研究所,山西太原030024

出　　处：《热加工工艺》2007年第22期66-69,共4页Hot Working Technology

基　　金：山西省留学人员基金资助项目(2004-20)

摘　　要：采用双层辉光离子渗金属技术对Ti6A14V合金（TC4）表面进行等离子渗镍研究。通过分析放电气压对渗层镍含量及厚度的影响得出，在950℃及20-50Pa进行合金化时，当气压为30Pa时可得到最佳质量的渗层。对此典型工艺条件下渗层的组织形貌、成分分布特征进行观察与分析，测试了渗层的显微硬度，并对渗层的摩擦学性能进行了研究。结果表明，渗层表面Ni含量最高可达95％，向内逐渐降低，基本呈梯度分布，显微硬度明显提高，耐磨性较基材TC4大大增强。Nickel alloying on titanium alloy （TC4） by double glow discharge plasma surface alloying process was studied. The optimized process conditions were obtained by analyzing the effects of discharge pressure on Ni content and thickness of alloying layer.While maintaining the treating temperature at 950℃, within the range of 20 to 50 Pa, the optimal alloying layer was obtained at barometric pressure 30 Pa, The microstructure and distribution of elements in the alloying layer were observed and analyzed under the typical processing conditions. The microhardness of the alloying layer was tested. The wearing performance of the alloying layer was also studied. The results indicate that Ni content of the alloying layer is up to 95% and descends gradually from surface to center, and hardness evidently enhances. The wear resistance of the alloying layer improves greatly compared with TC4 substrate.

关 键 词：TC4 辉光放电 离子渗Ni 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TG146.21[金属学及工艺—金属学]