冒国兵,孙宇峰,张光胜,刘琪

• 1:安徽工程科技学院安徽高性能有色金属材料省级实验室

摘要(Abstract)：

研究了添加不同含量的锶(Sr)及固溶处理(T4)对AM50镁合金显微组织和高温(150℃)拉伸性能的影响。结果表明:当Sr加入量为0.7wt%和1.4wt%时,AM50合金中形成了层片状的Al4Sr新相,而Mg17Al12相被抑制形成,固溶处理使Al4Sr相由层片状转变为颗粒状。当Sr加入量为2.8wt%和3.5wt%时,AM50合金中形成了骨骼状的Sr5Al9新相,固溶处理使热稳定性较高的Sr5Al9相由骨骼状向层片状和颗粒状转变。加入Sr能细化晶粒并显著提高合金在150℃下的拉伸性能,固溶处理明显提高了AM50-2.8Sr和AM50-3.5Sr合金高温下的抗拉强度,但对AM50-0.7Sr和AM50-1.4Sr合金高温拉伸性能影响较小。

关键词(KeyWords)： AM50镁合金;锶合金化;固溶处理;显微组织;高温力学性能

Abstract:

Keywords:

基金项目(Foundation): 安徽高校省级自然科学研究项目(KJ2010B022)

作者(Author): 冒国兵,孙宇峰,张光胜,刘琪

DOI: 10.13289/j.issn.1009-6264.2010.04.022

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