Ag含量对WC-12Co/Ag涂层高温摩擦性能的影响  

The Influence of Ag Content on WC-12Co/Ag Coating Friction Performance

作　　者：付东兴[1] 杨中元[1] 张晓囡[1] 张彬[1] 孙昊[1] 刘飞[1] 李文杰[1] 

机构地区：[1]北京有色金属研究总院有研粉末新材料(北京)有限公司,北京100088

出　　处：《热喷涂技术》2014年第4期13-17,共5页Thermal Spray Technology

摘　　要：采用超音速火焰喷涂技术制备了三种不同Ag含量(10%,15%和20%)的WC-12Co/Ag涂层,将其高温摩擦性能与WC-12Co涂层进行对比。通过微观检测手段分析了Ag在涂层中的分布形态;检测了500℃,不同载荷(50N,100N,150N和200N)条件下,WC-12Co/Ag涂层摩擦因数随摩擦行程增加而变化的情况;并观察了涂层高温摩擦试验后磨痕微观形貌以及Ag元素的分布状态。试验结果表明:Ag元素在涂层中均匀分布,涂层中的Ag主要以单质的形式存在;在500℃条件下,当Ag含量大于15%时,Ag元素在磨损界面处形成一定厚度的连续润滑膜,起到良好的自润滑作用。Three WC-12Co/Ag coatings with different Ag contents （10%,15% and 20%） were sprayed by high velocity oxy-fuel （HVOF） technology, and the friction performance of WC-12Co/Ag coating and WC-12Co coating was studied. The distribution of the Ag in the coatings was observed. The friction coefficient variation of WC-12Co/Ag coatings at 500 ℃and different load（50N,100N,150N,200N） was detected. The microstructure of worn surface and distribution of Ag after high temperature friction wear testing were observed. Testing results indicated that there was a lot of Ag simple substance in coatings which distributed uniformly. The coatings with Ag content more than 15%perform well for the continuous Ag film appearing on the worn surface during the friction and wear testing at 500℃.

关 键 词：WC-12CO AG 自润滑涂层 摩擦 超音速火焰喷涂 

分 类 号：TG174.4[金属学及工艺—金属表面处理]