激光熔覆镍基纳米Al_2O_3复合涂层的组织和摩擦性能  

Microstructure and Friction Properties of Ni-based Nano-Al_2O_3 Coating by Laser Cladding

作　　者：彭成章[1] 张小波[1] 

机构地区：[1]江西理工大学机电工程学院,江西赣州341000

出　　处：《矿冶工程》2008年第6期106-108,共3页Mining and Metallurgical Engineering

基　　金：国家自然基金项目(50764004);江西省教育厅科技项目(赣教技字[2007]202号)

摘　　要：采用激光熔覆技术在45钢基体上制备了镍基纳米Al2O3复合涂层,对熔覆层进行了微观组织分析和显微硬度及摩擦性能测试。结果表明,激光熔覆层的组成相主要为γ(Fe,Ni)、Cr7(B,C)3、Al15Fe4等,熔覆层的显微硬度HV0.3最高达到830,熔覆层与纯铝试件对摩时的磨损机制为粘着,并且随pv值增大时,粘着现象加剧,摩擦因素增大。Ni60/nano-AI2O3 composite coatings were formed on 0.45 % C steel substrate by laser cladding. The microstructure, micro-hardness and friction properties of the coating were analyzed and examined. The results showed that the main phases of the coating consisted of γ（ Fe, Ni）, Cr7 （B, C）3 and Al15 Fe4. The maximum micro-hardness HV0.3 of the coating reached to 830. The wear mechanism of the coating against pure aluminum was adhesion. With the increase ofpv value, the adhesion got intense while friction factor increased.

关 键 词：激光熔覆 复合涂层 摩擦性能 

分 类 号：TG156.99[金属学及工艺—热处理]