摘要
采用等离子喷涂工艺在H13热作模具钢表面制备了WC-12Co涂层,通过SEM、EDS和XRD等手段分析了试样表面-界面形貌、面能谱和物相组成,并通过磨损试验考察了其摩擦性能。结果表明,WC-12Co涂层主要成分是WC硬质相,均匀分布在涂层中,没有出现富集现象,具有良好的硬度和耐磨性能;在喷涂过程中没出现W_3O,涂层具有较好的抗氧化能力;涂层厚度约为400μm,结合界面为机械结合+局部微冶金结合方式;WC-12Co涂层其摩擦系数约为0.399,表现出良好的减摩性能和抗磨损能力;磨痕处化学元素分布较为均匀,在周期性碾压力作用下涂层在片状衔接部位结合力较弱处诱发裂纹,出现WC和Co开裂的失效现象。
A layer of WC-12 Co film was prepared on H13 hot work die steel surface by plasma spraying,the surface-interface morphology and phases of the coating were analyzed by means of field emission scanning electron microscopy（ FESEM）, energy dispersive spectrometer（ EDS） analysis and X-ray diffraction（ XRD）,and its friction properties were investigated by wear test. The results show that the WC-12 Co coating is mainly composed of WC hard phase with high hardness and wear resistance,which is evenly distributed in the coating. There is no W_3O phase appearing in the spraying process,showing that the coating has good anti-oxidation ability. The thickness of the coating is about 400 μm,and the interfacial bonding includes mechanical binding and local micro metallurgical bonding. The mean friction coefficient of the WC-12 Co coating is 0. 399,indicating good friction and wear resistance. The chemical element distributions of the worn trace is uniform. Under the periodic rolling force,the cracks are induced at the splat-to-splat inferfaces with weak binding force,and the cracking of WC and Co is observed in the coating.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第12期190-196,共7页
Transactions of Materials and Heat Treatment
基金
江苏省科技支撑计划(工业)(BE2014818)
关键词
等离子喷涂
WC-12CO涂层
面扫描
线扫描
摩擦系数
磨损形貌
plasma spraying
WC-12Co coating
elemental mapping
line scanning
friction coefficient
worn morphology of worn surface
作者简介
王文昌（1982-），男，主要从事材料表面改处理研究，E-mail：kingsun717@126.com。
