WC_p/高锰钢基复合材料及复合结构的冲击磨损性能

Impact Wear Resistance of WC_p/Hadfield Steel Composite and Composite Structure

采用挤压铸造法制备出WC_p/高锰钢基复合材料和复合材料-钢复合结构,研究复合材料和复合结构的冲击磨料磨损性能。在复合结构的WC预制体中及周围添加还原Fe粉,以控制复合结构中复合材料-钢的界面结构。结果表明:复合结构中复合材料-钢的界面在还原Fe粉吸热熔化的作用下,并没有出现复合材料中WC的熔解和形成过渡层的现象。复合材料磨损表面发生材料的崩落,耐磨性低于高锰钢,而复合结构耐磨性比高锰钢提高了1.34倍。通过对磨损形貌及组织的分析,讨论了复合材料崩落的原因及复合结构对冲击磨料磨损改善的机理。

The WC p/Hadfield steel composite and a composite-steel composite structure were manufactured by the squeeze casting method,the impact wear resistance of the WC p/Hadfield steel composite and the composite structure were investigated.Pure Fe powder was added into the WC particle preform and the surrounding region to control the structure of the interface between the steel and the composite in the composite structure.The results show that no melt of WC and no transition layer are formed at the interface between the steel and composite region in the composite structure,because the Fe powder absorbs a lot of heat and melt,however which is present in the composite.The wear rate of the composite is higher than the Hadfield steel,because of the material avalanched at the edge of the worn surface,but the wear resistance of the composite structure is improved by 1.34 times than Hadfield steel.Through the wear morphology analyzing,the reasons of the composite avalanching and the impact wear resistance mechanism for the composite structure were discussed.