消失模铸造WCp/Fe复合材料微观组织研究  

Study on Microstructure of Lost Foam Cast WCp/Fe Composites

作　　者：马国彬 谭建波[1,2,3] 于延龙 李春海 MA Guo-bin;TAN Jian-bo;YU Yan-long;LI Chun-hai(Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China;Key Laboratory of Near-Net Forming Technology of Hebei Province,Shijiazhuang 050018,Hebei,China;Hebei Engineering Laboratory of Aviation Lightweight Composite Materials and Processing Technology,Shijiazhuang 050018,Hebei,China;Shijiazhuang Industrial Pump Factory Co.,Ltd.,Shijiazhuang 050100,Hebei,China)

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050018 [2]河北省材料近净成形技术重点实验室,河北石家庄050018 [3]航空轻质复合材料与加工技术河北省工程实验室,河北石家庄050018 [4]石家庄工业泵厂有限公司,河北石家庄050100

出　　处：《铸造》2020年第2期149-153,共5页Foundry

基　　金：河北省新兴产业前沿技术开发专项(18211021D)。

摘　　要：采用消失模铸造工艺制备WCp/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600~2000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。WCp/Fe composites with different WC particle sizes were prepared by lost foam casting. The microstructure, phase composition and interfacial bonding of the WCp/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.

关 键 词：消失模铸造 WCp/Fe 颗粒粒度 微观组织 Fe3W3C复式碳化物 

分 类 号：TG333[金属学及工艺—金属压力加工]