添加Mg和Cu对Al-Fe-V-Si合金组织与性能的影响  

Effects of adding Mg and Cu elements on microstructure and mechanical properties of Al-Fe-V-Si alloy

作　　者：张林林[1] 肖于德[1] 周娟[1] 黎文献[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2006年第5期874-880,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展规划资助项目(TG1999064912)

摘　　要：采用OM、SEM、XRD、力学拉伸实验、硬度测试等手段研究了单独添加Mg及同时添加Mg和Cu对铸态Al-Fe-V-Si合金及其热挤压棒材显微组织和力学性能的影响。结果表明:添加Mg可以明显细化Al-Fe-V-Si合金的铸态组织,改善铝铁相的形貌与分布,还有利于提高合金的硬度与强度;同时添加Mg和Cu时,Cu部分抵消了Mg的细化作用,但经过热处理后,Mg2Si、Al2Cu和Al2CuMg相的形成,使合金的硬度与强度进一步提高。The effects of adding Mg element alone and adding Mg and Cu elements together on microstructure and mechanical properties of the as-cast and as-extruded bar of Al-Fe-V-Si alloy were investigated by means of OM, SEM, XRD, tensile test and hardness test, The results show that the addition of Mg element can refine the microstructure evidently, and ameliorate the appearance and distribution of iron-phase, and hence improve the hardness and strength of the alloy. With combined addition of Mg and Cu elements, Cu-present counteracts slightly the refining effect of Mg element, but due to the formation of Mg2Si, Al2Cu and Al2CuMg, the hardness and strength of the alloy can be enhanced further by heat-treatment.

关 键 词：AL-FE-V-SI合金 镁 铜 组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]