HVAF制备WC-12Co涂层的空蚀和磨损性能研究  

The Cavitation Behavior and Slurry Wear Resistance of WC-12Co Cermets Coatings Sprayed by AC-HVAF Technology

作　　者：王国刚[1] 孙冬柏[1] 樊自拴[1] 孟惠民[1] 俞宏英[1] 马光[1] 徐杰[1] 

机构地区：[1]北京科技大学腐蚀防护中心,北京100083

出　　处：《中国表面工程》2006年第4期21-24,31,共5页China Surface Engineering

基　　金：国家863计划(2002AA331080);北京市重大科技项目(H024200050021)

摘　　要：采用国际上最新的活性燃烧高速燃气喷涂(AC?HVAF)技术制备出WC?12Co金属陶瓷涂层。涂层的X射线衍射检测表明,涂层制备过程中未出现WC粒子的氧化和脱碳现象,涂层相结构基本保持了喂料粉末状态;对制备涂层进行的旋转圆盘空蚀试验表明,WC?12Co硬质涂层抗泥沙磨损性能出色,磨损量仅为不锈钢的1/10;其耐空蚀性能则相反,不及对比0Cr13Ni5Mo不锈钢;对涂层的空蚀破坏机理做了分析,对沙粒磨损损伤特点做了初步探讨。The WC-12 Co cermet coating was deposited by means of the newly developed in the world active combustion-high velocity air fuel （AC-HVAF） Technology. The X-Ray diffraction was employed to identify the chemical composition of the feedstock powder, as-sprayed and heat- treatment coatings. The patterns indicated that the chemical composition kept similarly, without W2C peak. The cavitation erosion and slurry erosion tests were carried out with the rotating disc equipment, the results showed that the WC-12Co coatings exhibited excellent slurry wear resistance than the sample made of 0Cr13NiSMo stainless steel. At last the mechanism of cavitation damage was discussed

关 键 词：空蚀 磨损 水轮机 HVAF WC-12CO 

分 类 号：TV131.2[水利工程—水力学及河流动力学]