【摘要】 利用预涂 Si粉对 Ti- 6Al- 4V合金进行激光表面合金化 ,制得以初生及共晶金属间化合物 Ti5Si3为增强相的快速凝固“原位”耐磨复合材料表面改性层 ,研究了激光表面合金化 Ti5Si3/β- Ti耐磨复合材料表面改性层的显微组织及其在干滑动磨损及二体磨料磨损条件下的耐磨性能。结果表明 :利用 Si粉对 Ti- 6Al- 4V合金进行激光表面合金化处理后 ,合金层硬度及耐磨性大幅度提高。更多还原

【Abstract】 Rapidly solidified in situ composite coatings reinforced by primary and eutectic Ti 5Si 3 intermetallic phases were prepared on Ti 6Al 4V substrates precoated with silicon powder by means of laser surface alloying. The microstructure of the laser surface alloyed Ti 5Si 3/β Ti in situ composite coatings and the wear resistance of the coatings under the wear conditions of dry sliding and two body abrasive were studied. The results show that both the hardness and wear resistance of alloy Ti 6Al 4V were significantly improved after laser surface alloying.更多还原