A Study of Laser Cladding on the NiCr/Cr3C2-WS2-CaF2 Coating
NiCr/Cr3C2-WS2-CaF2 mixed powders were prepared on 1Cr18Ni9Ti stainless steel substrate to fabricate high-temperature self lubrication wear resistant composite coating by laser cladding.The microstructure of the coating was examined by means of XRD,SEM and EDS.The high-temperature dry sliding friction and wear behavior of the composite coating were evaluated by using a ball-on-block wear tester at room temperature,300 ℃ and 600 ℃,respectively.The results showed that the composite coating had a unique microstructure consisting of γ-(Ni,Fe) solid solution matrix,Cr7C3/WC reinforcement and CrS/WS2 lubricant particles.The hardness of NiCr/Cr3C2-WS2-CaF2 coating by laser cladding was lower than NiCr/Cr3C2 coating,but higher than stainless steel substrate significantly.It was because of the addition of solid lubricant.In the wear process,elevated temperature was helpful to form a lubricating transfer film.As a result,the NiCr/Cr3C2-WS2-CaF2 coating exhibited a notable anti-friction and wear resistance at 300 ℃ and 600 ℃.
Laser cladding Composite coating Solid lubrication High-temperature wear
Shufa Chen Chenglong Feng Jin Yang Jinsong Chen
College of Mechanical Engineering, Huaihai Institute of Technology, Lianyungang, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
146-151
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）