SiC_p/AZ61镁基复合材料制备工艺和性能的研究  

Research on the Fabrication Process and Properties of SiC_p/AZ61 Magnesium Matrix Composites

作　　者：张发云[1] 闫洪[1] 陈国香[1] 周天瑞[1] 揭小平[1] 胡强[1] 王建金[1] 

机构地区：[1]南昌大学先进成形制造及模具研究所

出　　处：《铸造》2007年第6期611-614,共4页Foundry

基　　金：国家自然科学基金(50465003);江西省科技厅和江西省教育厅资助项目。

摘　　要：研究了三种不同铸造工艺条件下镁基复合材料的组织结构,并对其硬度进行了测定。结果表明:与全液态铸造法和半固态铸造法相比,搅熔铸造制备的SiCp/AZ61镁基复合材料,其增强相SiC颗粒分布均匀,气孔率较少,是一种较理想的金属基复合材料制备工艺。未增强的AZ61基体镁合金的维氏硬度高于其半固态坯料的维氏硬度;而SiCp/AZ61镁基复合材料的维氏硬度明显高于基体的维氏硬度,并随着SiC颗粒体积分数的增加其复合材料的维氏硬度不断提高。The microstructure structures of magnesium matrix composite with various casting process conditions were studied, and their hardness were measured. The results indicated that SiCp/AZ61 magnesium matrix composites fabricated by stirring melt casting process, comparing with stirring in a fully liquid condition and stirring in a semi-solid condition, possessed fairly uniform distribution of SiC particulates and few of porosity rate. It was an ideal metal matrix composites preparing process. The vickers hardness of non-reinforcement AZ61 magnesium is higher than that of semi-solid billet, and the vickers hardness of SiCp/AZ61 magnesium matrix composite is obviously higher than that of the matrix. In the meantime, the vickers hardness of SiCp/AZ61 magnesium matrix composite can be continuously enhanced with an increasing of volume fraction of SiC particles.

关 键 词：搅拌铸造 气孔率 金属基复合材料 搅熔铸造 

分 类 号：TB333[一般工业技术—材料科学与工程] TG24[金属学及工艺—铸造]