Ti-6Al-4V合金激光表面合金化制备Ti_5Si_3/Ti耐磨复合材料涂层研究  

Wear-Resistant Ti_5Si_3/Ti Composite Coatings Made by Laser Surface Alloying

作　　者：蒋平[1] 张继娟[1] 于利根[1] 王华明[1] 

机构地区：[1]北京航空航天大学,北京100083

出　　处：《稀有金属材料与工程》2000年第4期269-272,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金!资助项目 (59671 0 50 ) ;航空基础科学基金!资助项目 (0 0 H51 0 1 3)

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。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.

关 键 词：激光表面合金化 钛合金 TI5SI3 复合材料涂层 

分 类 号：TG174[金属学及工艺—金属表面处理]