Mg2Si含量对过共晶Al-Si复合材料组织和性能影响  

Effect of Mg2Si Content on Microstructure and Properties of Hypereutectic Al-Si Composites

作　　者：董拴涛 DONG Shuan-tao(Yangling Vocational&Technical College,Yangling 712100,Shaanxi,China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100

出　　处：《合成材料老化与应用》2021年第1期62-64,共3页Synthetic Materials Aging and Application

基　　金：杨凌职业技术学院2019年自然科学研究基金项目(项目编号:A2019032)。

摘　　要：用直接熔体反应法制备了Mg2Si增强过共晶Al-Si合金复合材料,研究了Mg2Si含量对复合材料的凝固组织和性能的影响。结果表明,Mg2Si的形貌随着其含量的增加而明显变化,由多边形块状向颗粒状转变,最终转变成粗大的树枝状。复合材料的硬度和耐磨性能与初生Mg2Si相的形态和数量有一定关系;初步探讨了Mg2Si晶体的生长特性。Mg2Si reinforced hypereutectic Al-Si alloy composite was prepared by direct melt reaction.The effect of Mg2Si content on the solidification structure and properties of the composite was studied.The results show that the morphology of Mg2Si changes obviously with the increase of Mg2Si content,from polygonal block to granular,and finally to coarse dendrite.The hardness and wear resistance of the composite are related to the morphology and quantity of primary Mg2Si phase,and the growth characteristics of Mg2Si crystal are discussed.

关 键 词：过共晶AL-SI合金 MG2SI 复合材料 凝固组织 耐磨性能 

分 类 号：TG333[金属学及工艺—金属压力加工]