CAJ | 학술논문

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。
채용초음속화염분도기술제비료삼충불동Ag함량（10%，15%화20%）적WC-12Co/Ag도층，장기고온마찰성능여WC-12Co도층진행대비。통과미관검측수단분석료Ag재도층중적분포형태；검측료500℃，불동재하（50N，100N，150N화200N）조건하，WC-12Co/Ag도층마찰인수수마찰행정증가이변화적정황；병관찰료도층고온마찰시험후마흔미관형모이급Ag원소적분포상태。시험결과표명：Ag원소재도층중균균분포，도층중적Ag주요이단질적형식존재；재500℃조건하，당Ag함량대우15%시，Ag원소재마손계면처형성일정후도적련속윤활막，기도량호적자윤활작용。
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℃.