激光熔覆Cr_3C_2-Ni复合涂层的减摩性能  

Friction Properties of Cr_3C_2-Ni Coatings Prepared by Laser Cladding

作　　者：俞佳[1] 朱流[2] 罗来马[1] 郦剑[1] 

机构地区：[1]浙江大学材料科学与工程系,浙江杭州310027 [2]台州学院机电系,浙江台州318000

出　　处：《热加工工艺》2010年第6期86-88,共3页Hot Working Technology

摘　　要：以粉末化学镀法制备的Cr3C2-Ni复合粉末作为预置层,在Q235钢板表面用激光熔覆技术制备了减摩复合涂层。研究了Cr3C2-Ni涂层在干摩擦条件下的减摩性能,并对磨损形貌进行了SEM观察,对涂层的硬度进行了测试。结果表明,该涂层组织均匀致密、硬度较高;涂层的摩擦性能稳定,摩擦系数为0.44;硬质Cr3C2粒子与金属粘结相的配合能有效提高熔覆层的承载能力,减小摩擦损失。Cr3C2-Ni composite powders were synthesized by powder electroless plating method and performed as precoated layer in laser cladding in order to obtain antifriction coatings on Q235 steel plate. Dry friction properties of the laser cladding coatings were investigated. The wear morphology and hardness of the coating was observed and tested,respectively. The results show that,the coatings have uniform and dense microstructure,and relatively high hardness as well. The laser cladding coatings perform stable friction state and friction coefficient is 0.44. The good properties benefit from the carbide and metallic binding phase.

关 键 词：Cr3C2-Ni复合涂层 激光熔覆 摩擦系数 磨损形貌 

分 类 号：TB333[一般工业技术—材料科学与工程]