Ni-W(D)/PTFE复合刷镀层组织特征及耐磨性能研究  

Research on Microstructure Characteristic and Wear Resistance of Ni-W(D)/PTFE Composite Coating Prepared by Electro-brush Plating

作　　者：杜鑫磊[1] 袁庆龙[1] 李平[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454003

出　　处：《热加工工艺》2016年第12期134-137,141,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51275156)

摘　　要：采用电刷镀工艺,在2Crl3不锈钢上制备了Ni-W(D)/PTFE复合镀层。采用扫描电镜、划痕仪和摩擦磨损试验机等对镀层形貌、结合强度及耐磨性进行了分析。结果表明,与Ni-W(D)合金镀层相比,随镀液中PTFE纳米颗粒含量增加,Ni-W(D)/PTFE复合镀层表面组织更加平整致密,镀层上的胞状突起减少。PTFE软质聚合物颗粒的均匀分布,缓解了Ni-W(D)/PTFE复合镀层的内应力,裂纹密度增加而宽度降低。镀层与打底层之间结合紧密。PTFE颗粒的自润滑作用,显著降低了复合镀层的摩擦系数,改变了镀层的磨损机制。Ni-W （D） based composite coating containing PTFE particles was prepared by electro-brush plating on 2Cr 13 steel substrate. The morphology, bonding strength and wear resistance of the coatings were analyzed with SEM, microhardness tester, scratch tester and friction-wear tester. The results show that, compared with traditional Ni-W（D） coating, the surface morphology of the Ni-W （D）/PTFE composite coating becomes more leveling and compact, and the cellular protuberance of the composite coating reduces with the increase of the content of nano-PTFE particles in the plating solution. The soft PTFE polymer particles distribute uniformly in composite coating, which can reduce the inner stress of the composite coating, then the crack density increases but the breadth reduces. Compact combination is formed between the composite coating and substrate. The self-lubricating of PTFE particles brings down the fiiction coefficient observably and then the wear mechanism of the coating changes.

关 键 词：PTFE Ni-W(D)/PTFE 复合镀层 耐磨性 

分 类 号：TG178[金属学及工艺—金属表面处理] TQ153[金属学及工艺—金属学]