钛合金双层辉光离子无氢碳氮共渗摩擦性能研究

利用双层辉光离子渗金属原理改善钛合金Ti6Al4V的耐摩擦性。使用蜂窝状高纯度固体石墨作为源极，钛合金Ti6Al4V做阴极，一定比例的氩气、氮气作为载气。依靠辉光放电空心阴极效应，溅射出原子、离子状的碳元素，碳、氮元素混合形成等离子体，靠阴极负偏压把碳、氮吸引到Ti6Al4V的表面，依靠轰击和扩散在Ti6Al4V材料表面形成具有特殊物理、化学性能的合金层。X射线衍射检测显示渗层内形成了包含TiC，TiN的硬度相；辉光放电光谱（GDS）检测结果显示，在渗层内碳、氮元素分们呈梯度形式；硬度测试显示渗层硬度由表及里呈现梯度下降，表面硬度提高两倍以上；摩擦磨损检测表明Ti6Al4V材料经无氢碳氮共渗处理后，其粘着现象明显降低，摩擦系数降低一半多，耐磨性大大提高。

Research of Tribological Characteristics of Double Glow Plasma Hydrogen-Free Carbonitriding on Titanium Alloys

Using the double glow plasma metallulgy principle improve the tribological properties of Ti6Al4V. A high pure solid honeycomb graphite was taken as source cathode, titanium alloy Ti6Al4V as cathode, high pure argon and nitrogen gas as working gas, The carbonitriding Iayer with special physical and chemical properties was prepared on the surface of Ti6Al4V. The phase compositions and C. N, Ti distribution in carbonitriding layer were determined by means of XRD and glow discharge spectrometry. The surface layer microhardness distribution was measured gradually from surface to inner. Microhardness of surface increased more than two times. Results from friction and wear test show thai the wear resistance property of TifAl4V alloy is improved evidently.