亚共晶铝硅合金自生Mg2Si复合材料的显微组织研究
Study on Microstructure of In-situ Mg2Si Reinforced Hypoeutectic Al-Si Alloy Composite
胥 锴1, 刘徽平
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作者单位:(1. 安徽机电职业技术学院 机械工程系, 安徽 芜湖 241000; 2. 江西理工大学 材料分析测试中心, 江西 赣州 341000)
中文关键字:亚共晶铝硅合金; 复合材料; 显微组织; 自生Mg2Si
英文关键字:hypoeutectic Al-Si alloy; composite; microstructure; Mg2Si
中文摘要:采用光学显微镜,对亚共晶Al-8%Si合金自生Mg2Si复合材料的显微组织进行分析。结果表明,Al-8%Si合金中加入6%镁时,共晶Mg2Si组织呈完整发达的古汉字状、树枝状、五星花瓣状等;加入2%镁时,Mg2Si量极少,呈零星颗粒状、鱼骨状或树枝状;加入4%镁时,共晶Mg2Si组织形貌呈纤维状、树枝状,这种显微组织即为亚共晶Al-8%Si合金自生Mg2Si增强相的理想组织。
英文摘要:By means of optical micrograph, the microstructure of in-situ Mg2Si reinforced hypoeutectic Al-8%Si alloy composite was studied. The results show that, the microstructure of eutectic Mg2Si in the composite with 6%Mg is coarse chinese characters-like shape and dendritic shape. While the content of magnesium is 2%, the number of eutectic Mg2Si in the composite with 2%Mg decreases, the microstructure of eutectic Mg2Si is particle shape and dendritic shape. The microstructures of eutectic Mg2Si in the composite with 4% Mg is fibrilliform and dendritic shape, which is the optimum microstructure of in-situ Mg2Si reinforced hypoeutectic Al-8%Si alloy composite.