MICROSTRUCTURE AND PROPERTIES OF LASER REMELTED NI-BASED ALLOY SELFLUBRICATING HVOF SPRAYED COATING
A process of HVOF spraying and laser remelting of a Ni-based alloy nana h-BN powder to form a coating on AISI1045 steel was carried out. Microstructure and frictional properties of HVOF spraying and laser remelted coating were studied. Lamellar structure was obtained in HVOF spraying process, high porosities and lower bonding strength. During the laser remelting process, a reaction between h-BN and Ni occurred, and generated hard phase CrB, Ni3B. Moreover some carbide was deposited in the laser remelted layer. Results show that laser remelting can greatly improve the microstructure of HVOF sprayed nickel/h-BN composite coatings. The remelted coatings with hard phases and lubricant have uniform and dense microstructure, firm interface and higher wear resistance.
Microstructure Laser remelted Nickelbased alloy Self-lubricating coating
X.F. Zhang X.L. Zhang A.H. Wang H.G. Xu Z.W. Huang
State Key Laboratory of Plastic Forming and Die & Mould Technology, Huazhong University of Science & Technology, Wuhan, 430074, P. R. China
国际会议
第三届太平洋国际激光与光学应用会议(PICALO 2008)
北京
英文
640-645
2008-04-16（万方平台首次上网日期，不代表论文的发表时间）