李红英,刘洋,康巍,赵延阔,武岳

• 1:中南大学材料科学与工程学院

摘要(Abstract)：

采用差示扫描量热法(DSC)、光学显微镜(OM)、扫描电镜(SEM)等手段研究了均匀化处理对铸态ZA27合金显微组织及力学性能的影响,确定了该合金的均匀化温度及过烧温度。结果表明,合金铸态组织存在严重的枝晶偏析及明显的非平衡共晶组织,经360℃×12 h均匀化退火后,枝晶偏析及非平衡共晶β相基本消除,晶界处富Cu的ε相溶入基体,布氏硬度为84.5HB,抗拉强度为326 MPa,伸长率为10.2%。ZA27合金铸锭适宜的均匀化处理工艺为360℃×12 h。

关键词(KeyWords)： 高铝锌基合金;均匀化;组织;性能

Abstract:

Keywords:

基金项目(Foundation): 湖南有色研究基金(Y2008-01-006)

作者(Author): 李红英,刘洋,康巍,赵延阔,武岳

DOI: 10.13289/j.issn.1009-6264.2010.12.018

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