辉光离子渗氮对Ti6Al4V合金在航空煤油中摩擦学性能的影响  

The Effect of the Plasma Nitriding Layer in Aviation Kerosene Environment on the Tribological Behavior of Ti6Al4V Titanium Alloy

作　　者：汤金钢[1] 刘道新[1] 唐长斌[2] 张晓化[1] 熊华 唐宾[4] 

机构地区：[1]西北工业大学腐蚀与防护研究所,西安710072 [2]西安建筑科技大学,西安710055 [3]西安航空动力控制科技有限公司,西安710077 [4]太原理工大学表面工程研究所,太原030024

出　　处：《机械科学与技术》2014年第1期140-145,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51171154;51101127)资助

摘　　要：为改善钛合金在航空煤油中的摩擦学性能,采用辉光离子渗氮技术对Ti6Al4V钛合金表面进行改性处理。分析了渗氮层的表面形态、组织结构、显微硬度沿层深的分布,对比研究了钛合金基体、渗氮层和5CrMnMo工具钢在航空煤油中分别与GCr15钢及QSn4-3铜合金配副对磨时的耐磨性能,并探讨了渗氮层的表面粗糙度对摩擦磨损行为的影响。结果表明:Ti6Al4V钛合金表面渗氮层硬度明显高于5CrMnMo工具钢,经表面抛光后处理,其耐磨性能显著优于钛合金基材与5CrMnMo工具钢,同时也有效降低了摩擦配副的表面磨损。研究同时发现QSn4-3铜合金配副的磨损体积损失与渗氮层的表面粗糙度呈线性递增关系,原因归于铜合金配副的磨损失效由渗氮层表面微凸体的磨粒磨损作用及航空煤油的润滑状况决定。In order to improve the tribological behavior in aviation kerosene, plasma nitriding layer in the Ti6M4V base alloy were fabricated by using a plasma glow-discharge surface technique. The morphology, microstructure and microhardness depth distribution of the plasma nitriding layer were studied. The tribological properties of the Ti6M4V base alloy, nitriding layer and 5CrMnMo steel sliding with GCrl5 steel or QSn4-3 copper alloy counterparts in aviation kerosene were comparatively studied. The effect of the roughness on the sliding wear behavior was discussed. The re- sults indicated that the nitriding modified layer with polishing treatment not only reduce the wear volume of Ti6A14V base alloy, but also enhance the wear resistance of the counterparts due to the high microhardness of nitriding layer. The nitriding modified layer has better tribological behavior than that of 5CrMnMo steel. It is also found that the wear volumeloss of the counterparts is proportional to the value of roughness of nitriding modified layer, which is related directly to the ploughing wear between micro convex bodies of the layer and counterparts.

关 键 词：离子渗氮 TI6AL4V合金 磨损 航空煤油 

分 类 号：TG178[金属学及工艺—金属表面处理]