纯铜表面双层辉光离子渗钛合金层的摩擦磨损性能  

Friction and Wear Properties of Ti-permeated Layer on Copper by Double Glow Discharge

作　　者：张跃飞[1] 袁庆龙[2] 陈飞[3] 苏永安[2] 徐重[2] 

机构地区：[1]北京印刷学院等离子体物理及材料研究室,北京102600 [2]太原理工大学表面工程研究所,山西太原030024 [3]北京石油化工学院机械工程学院,北京102600

出　　处：《摩擦学学报》2003年第4期292-295,共4页Tribology

摘　　要：采用双层辉光离子渗金属技术,在纯铜表面形成含钛的合金渗层;采用扫描电子显微镜观察分析磨损表面形貌,并分析了磨损机理.结果表明:纯铜表面经离子渗钛后形成了以金属间化合物Cu4Ti和含钛的α固溶体为主的合金渗层,从而使表面强度提高,磨损性能明显改善;纯铜磨损表面呈撕裂特征,而离子渗钛试样仅发生轻微擦伤.Double glow discharge was applied to obtain Ti-permeated layer on the pure copper substrate. The depth distribution of the microhardness of the Ti-permeated layer was measured on a microhardness tester, its phase composition was examined by means of X-ray diffraction, and its morphology and the cross-section were observed with a scanning electron microscope. The friction and wear behavior of the Ti-permeated layer sliding against SAE52100 steel counterpart (GCr15) was comparatively evaluated with that of the Cu substrate on an MM-200 friction and wear tester. The worn surface morphologies of both the Cu substrate and the Ti-permeated Cu specimens were observed with a scanning electron microscope as well. The results showed that the Ti-permeated layer on the Cu substrate had much higher microhardness and much better wear resistance than the pure Cu. This was attributed to the eutectic strengthening effect of the α-Ti and the dispersive strengthening effect of the Cu4Ti precipitation formed in the Ti-permeated layer during the Ti-permeation process by double glow discharge. The worn surface of the Cu substrate was characterized by severe adhesion and peeling off, while that of the Ti-permeated Cu was characterized by mild scuffing, which were related to their different friction and wear behaviors.

关 键 词：纯铜 离子渗钛 摩擦磨损性能 

分 类 号：TG142.2[一般工业技术—材料科学与工程]