摘要
将NiCr-Cr3C2复合粉和Ni包MoS2粉按不同比例混合,制成三种喷涂粉末,采用等离子喷涂技术在304不锈钢表面制备复合自润滑涂层,并对涂层的物相组成、显微组织及摩擦磨损性能进行了研究。结果表明:三种涂层的物相组成相同,主相均为Cr7C3,Ni和MoS2;涂层与基体的结合为机械结合,孔隙率较低,表面有少量微裂纹;喷涂粉末中的Ni包MoS2粉偏少或偏多都会导致涂层的摩擦磨损性能变坏,Ni包MoS2粉质量分数为30%时,涂层的摩擦系数及磨损率最低,分别约为0.36和3.3×10-4mg/s。
NiCr-Cr3C2 based self-lubricating composite coatings of different content of cladded MoS2 by Ni powder were deposited on 304 stainless steel by plasma spraying technology.The phase composition,microstructure and frictional behaviour of coatings were reasearched.The results indicate that the kinds of coatings have same phase composition,whch is Cr7C3,Ni and MoS2.Mechanical bonding forms between coating and substrate,the porosity of coatings is low,a small amount microcrack exsists on the surface of coatings.Excessive or scarce cotent of cladded MoS2 by Ni powder in the coatings can induce worsening of frictional behaviour,the lowest value of friction coefficient and wear rate are separately 0.36 and 3.3×10^-4 mg/s,which the content of cladded MoS2 by Ni powder in the coatings is 30%.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2013年第3期52-55,共4页
Surface Technology
关键词
等离子喷涂
自润滑涂层
显微形貌
摩擦磨损
plasma spraying
self-lubricating coatings
microstructure
friction and wear
