离心铸造Al－Cr合金自生梯度复合材料  

In Situ Gradient Composites of Al-Cr Alloy by Centrifugal Casting Method

作　　者：王渠东[1] 金俊泽[1] 

机构地区：[1]大连理工大学

出　　处：《铸造》1996年第4期8-12,共5页Foundry

基　　金：国家自然科学基金

摘　　要：采用预热金属型离心铸造Ａｌ－Ｃｒ合金，获得外层为偏聚梯度分布的Ａｌ，Ｃｒ，内层含少量偏聚Ａｌ７Ｃｒ，中间层不含偏聚Ａｌ７Ｃｒ的自生梯度复合材料。检测了偏聚Ａｌ７Ｃｒ、硬度和耐磨性沿径向的分布，考察了型温和Ｃｒ含量对显微组织的影响，分析了复合材料的形成过程和断裂性能。In situ gradient composites of Al-Cr alloy which processes the microstructure of accumulated Al7Cr with gradient distribution in outer layer, less accumulated Al,Cr in inner layer and no accumulated Al7Cr in middle layer, have been achieved using preheated permanent mould centrifugal casting.The distribution of accumulated Al7Cr, its hardness and wear resistance were tested, the effects of mould temperature and Cr content on microstructure were discussed, the formation process of composites and its fracture characteristic were also analysed.

关 键 词：铝铬合金 金属型铸造 离心铸造 梯度复合材料 

分 类 号：TG249.4[金属学及工艺—铸造] TG292