【摘要】 采用消失模铸造工艺制备WC_p/Fe复合材料,研究了其组织形貌、物相成分及界面结合情况。结果表明,粒度为600～2 000目的WC颗粒在高温铁液内完全溶解并发生了化学反应,反应产物绝大部分以Fe₃W₃C复式碳化物形式在晶界处析出,剩余少部分W和C以多组分固溶体形式存在于基体中;Fe₃W₃C相整体分布较为均匀,局部略有聚集,界面结合较好;WC颗粒偏聚处产生大量的Fe₃W₃C相,使界面反应层形成较多的显微缩松,对界面结合状况有显著影响。更多还原

【Abstract】 WC_p/Fe composites with different WC particle sizes were prepared by lost foam casting. The microstructure, phase composition and interfacial bonding of the WC_p/Fe composites were studied. The results show that the WC particles between 600 to 2 000 meshes were completely dissolved into high temperature molten iron and undergo chemical reactions. And the great majority of the reaction product Fe₃ W₃ C carbide（a ternary compound） precipitated at the grain boundaries, while W and C were found only in small amounts in the matrix with multi-component solid solution form. The overall distribution of Fe₃ W₃ C phase was fairly uniform, with a slight local aggregation and good interface bonding. A large amount of Fe₃ W₃ C phase was produced at the segregation and aggregation zone of WC particles, which resulted in more microshrinkage in the interfacial reaction layer, and had a significant effect on the interfacial bonding.更多还原