激光熔覆等离子喷涂Al_2O_3陶瓷涂层组织结构研究  

Microstructure of Al_2O_3 Ceramic Coating on 45 Steel by Plasma Spraying and Laser Cladding

作　　者：斯松华[1] 袁晓敏[1] 何宜柱[1] 

机构地区：[1]安徽工业大学激光加工研究中心,安徽马鞍山240002

出　　处：《表面技术》2002年第4期11-14,共4页Surface Technology

基　　金：安徽省教育厅中韩国际合作项目 (2 0 0 0J1184)

摘　　要：研究了 45钢表面激光熔覆等离子喷涂Al2 O3陶瓷涂层的组织结构、显微硬度及滑动磨损特性。结果表明 ,等离子喷涂Al2 O3涂层的组织呈层片状 ,层间为机械结合 ,涂层由α -Al2 O3,ZrO2 和少量γ -Al2 O3组成 ;激光熔覆Al2 O3陶瓷涂层组织为细小枝状晶 ,由α -Al2 O3及少量ZrO2 组成。激光熔覆Al2 O3涂层的显微硬度较高 ,滑动磨损时耐磨性明显优于等离子Al2The microstructure, microhardness and characteristics of sliding wear of Al 2O 3 ceramic coating of plasma spraying and laser cladding on 45 steel have been studied. The results show that the microstructure of plasma spraying Al 2O 3 coating is lamellar in shape, there is a mechanical combination interface, the coating consists of α-Al 2O 3, ZrO 2 and γ-Al 2O 3. The microstructure of laser cladding Al 2O 3 coating is columnar, consisting of a unitary α-Al 2O 3 and ZrO 2,and has the higher hardness and obviously superior sliding wear resistance than plasma spraying Al 2O 3 coating.

关 键 词：激光熔覆 等离子喷涂 AL2O3陶瓷涂层 组织结构 研究 氧化锆 

分 类 号：TG174.453[金属学及工艺—金属表面处理]