Ti-6Al-4V合金表面等离子Nb合金化工艺  

Process of Double Glow Surface Plasma Niobizing of Ti-6Al-4V Alloy

作　　者：姚文苇[1] 

机构地区：[1]陕西学前师范学院物理与电子技术系,陕西西安710100

出　　处：《热加工工艺》2014年第14期143-145,148,共4页Hot Working Technology

基　　金：陕西省科技厅科研计划项目(2011JM1018);陕西教育学院科研基金资助项目(11KJ022)

摘　　要：采用双辉等离子表面冶金技术对Ti-6Al-4V合金进行等离子渗铌处理。研究了温度与保温时间对合金层元素含量和渗层厚度的影响,以确定最佳渗金属工艺参数。利用光学图像分析仪以及辉光放电能谱仪观察和测定合金层的金相组织、渗层厚度及成分。结果表明,在极间距和气压恒定的条件下,渗层厚度及成分与温度和保温时间有关。温度过高或保温时间过长均会在Ti-6Al-4V试样表面产生较厚的Nb沉积层。经优化工艺参数,选择850℃保温3 h渗铌,得到一定厚度且与基体为冶金结合的合金层。该合金层可以克服Ti-6Al-4V合金耐磨性差的缺点。The double glow surface plasma niobizing was performed on Ti-6Al-4V alloy. The effects of alloying temperature and time on element content and thickness of the alloyed layer were studied. The optimum processing parameter was determined. The microstructure, chemical composition and thickness of the alloyed layer were observed by OM and glow discharge spectrum. The results show that the thickness and composition of the alloyed layer are related to the alloying temperature and time on the condition of a constant pressure and fixed cathode. A deposit layer on the surface of Ti-6Al-4V is formed by too long alloying time or too high temperature. The appropriate thickness and composition distribution of the alloyed layer made by an optimized process parameter of 850℃ × 3 h is useful to overcome the poor wear resistances of Ti-6Al-4V alloy.

关 键 词：TI-6AL-4V合金 等离子 工艺参数 

分 类 号：TG135.1[一般工业技术—材料科学与工程]