论文部分内容阅读
采用新型电火花沉积设备,把YG8电极材料沉积在铸钢轧辊材料上,制备了WC沉积涂层,研究了其微观组织及耐磨性能.结果表明:沉积层主要由Fe3W3C、Co3W3C、W2C和Fe7W6C等相组成;沉积层与基体冶金结合,具有纳米颗粒尺寸的Fe7W6、W2C等硬质相弥散分布于沉积层中;沉积层的平均硬度为1 331 HV;沉积层较铸钢轧辊的磨损性能提高了2.3倍;沉积层的磨损机理以疲劳磨损为主,细小的弥散分布的硬质相是沉积层硬度及耐磨性提高的主要因素.
A new type of EDM deposition equipment was used to deposit the YG8 electrode material on the cast steel roll material to prepare the WC deposition coating.The microstructure and wear resistance of the YG8 electrode material were studied.The results show that the deposition layer is composed of Fe3W3C, Co3W3C, W2C and Fe7W6C And other phases; the deposition layer and the substrate metallurgical bonding, with nano-size Fe7W6, W2C and other hard phase dispersed in the sedimentary layer; the average hardness of the deposited layer is 1 331 HV; 2.3 times. The wear mechanism of the deposited layer is mainly fatigue wear. The fine dispersed and hard phase is the main factor to improve the hardness and wear resistance of the deposited layer.