激光熔覆TiC/Ti复合材料的组织及摩擦学性能  

Microstructure and Wear Performance of Laser Clad Surface TiC/Ti Composite on Ti Alloy

作　　者：张松[1,2] 王茂才 吴维[1,2] 毕红运 李诗卓[1,2] 李曙[1,2] 

机构地区：[1]中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室 [2]中国科学院金属研究所

出　　处：《摩擦学学报》1999年第1期18-22,共5页Tribology

摘　　要：采用激光熔覆工艺，通过原位置换结晶反应在Ｔｉ６Ａｌ４Ｖ基材上制备出碳化物颗粒增强复合材料熔覆层，发现复合材料由均匀弥散分布的ＴｉＣ颗粒及β－Ｔｉ基体构成，且与基材呈冶金结合．干摩擦下其磨痕及磨屑扫描电镜分析表明。A surface composite TiC/Ti on Ti6Al4V alloy was prepared by means of in situ reaction of the pre placed powder mixtures on the alloy induced by laser cladding. The formed composite layer is consisted of dispersed fine TiC particles in matrix of beta Ti, and the particles size from 0.5 to 2.0 μm and the composite layer has good metallurgical bonding with the substrate. The composite layer shows abrasive resistance sligtly superior to Ti6Al4V alloy and possesses higher friction coefficient. Furthermore, the excellent anti abrasive performance of the composite layer was discussed in terms of the results of dry sliding wear testing and the morphological observation of the worn surface and wear debris by SEM.

关 键 词：激光熔覆 复合材料 摩擦学性能 钛合金 碳化钛 

分 类 号：TB333[一般工业技术—材料科学与工程] TH117.1[机械工程—机械设计及理论]