热变形加工对WC_p/2024Al复合材料组织结构和力学性能的影响  

Effect of thermal deformation on microstructure and mechanical properties of the WC_p/2024Al composites

作　　者：毛昌辉[1,2] 孙旭东[1] 王涛[2] 杨剑[2] 梁秋实[2] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]北京有色金属研究总院先进电子材料研究所,北京100088

出　　处：《材料与冶金学报》2012年第4期292-296,共5页Journal of Materials and Metallurgy

基　　金：国家自然科学基金(50172030);教育部中央高校基本科研业务费专项资金(N110802001;N100702001)

摘　　要：本文采用真空热压方法制备了WCp/2024Al复合材料,研究了真空热压-热锻压-热轧制等热变形加工工艺对复合材料微观组织结构和力学性能的影响.结果表明,热锻压和热轧制加工显著细化了基体Al合金组织,改善了WC颗粒的分散性,促进了两相界面的冶金结合,材料强度得到大幅度提高;高变形速率的热锻压和热轧制工艺可降低复合材料界面WAl12中间相的生成温度,大量中间相的生成导致材料塑性下降.The WCp/2024Al composites were fabricated by a vacuum hot-pressing method.The effect of thermal deformation processes such as hot-pressing,hot-forging and hot-rolling on microstructure and mechanical properties of the composites was investigated.The results show that hot-forging and hot-rolling can refine microstructure of the Al alloy,increase homogeneity of WC particle dispersion,and improve interfacial bonding between the Al alloy and the WC particles,leading to a significant increase in tensile strength of the WC/2024Al composites.Hot-forging and hot-rolling under high deformation rates result in the formation of large amount of WAl12 intermediate phase due to the lowering of formation temperature of the intermediate phase by deformation,and as consequence,plasticity of the composites reduces.

关 键 词：铝基复合材料 热变形加工 界面反应 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]