祝贞凤,隋信举,杨丽娟,汪洪波,史春丽

• 1:烟台南山学院工学院材料系
• 2:山东南山科学技术研究院
• 3:山东南山铝业股份有限公司

摘要(Abstract)：

通过扫描电镜和透射电镜观察,研究了单级和双级均匀化工艺对铸态Al-8.5Zn-2.3Cu-2.2Mg(mass%)合金相组织的影响。结果表明:经465℃×(12~36 h)单级均匀化处理,残留相仍然较多;经430℃×12 h+470℃×24 h、465℃×24 h+475℃×12 h双级均匀化处理,残留相的数量显著减少,465℃×24 h+475℃×12 h处理残留相更少;465℃×24 h单级均匀化处理残留相主要为Al_2CuMg,少量Al7Cu2Fe,经430℃×12 h+470℃×24 h、465℃×24 h+475℃×12 h处理除还有少量Al(ZnMgCu)相没溶外,没有发现Al_2CuMg;此外,430℃×12 h+470℃×24 h双级均匀化处理相比于465℃×24 h单级处理,有利于析出弥散、均匀的Al_3Zr粒子。

关键词(KeyWords)： Al-8.5Zn-2.3Cu-2.2Mg合金;微观组织;均匀化退火;金属间化合物

Abstract:

Keywords:

基金项目(Foundation): 国家十三五重点研发专项(2017YFB0306404);; 山东省高等学校科技计划项目(J16LA57)

作者(Author): 祝贞凤,隋信举,杨丽娟,汪洪波,史春丽

DOI: 10.13289/j.issn.1009-6264.2017-0375

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