蔡刚毅,邓鹏辉,吴海宏

• 1:河南工业大学机电工程学院

摘要(Abstract)：

针对AZ80镁合金采用了固溶处理+预时效+形变+时效处理的工艺路线,研究了预时效及随后的形变对其组织和性能的影响。试验结果表明,固溶处理使绝大部分Mg17Al12相溶入了α-Mg基体。形变处理后,晶粒被拉长,颗粒相或杂质沿变形方向分布,出现明显的纤维组织,晶粒内部出现了大量交错的形变孪晶。变形程度越大,加工硬化效果越显著,到30%时,硬度增长缓慢。形变前预时效增加了再结晶的形核,在形变后的时效处理过程中,发生了再结晶,形变产生的纤维组织消失,生成了等轴晶粒,形变程度越大,再结晶后的等轴晶粒越细小。再结晶软化和时效析出强化共同作用,使得AZ80镁合金的硬度比时效前略有升高。因此,形变热处理能有效地改善AZ80镁合金的组织和提高其力学性能。

关键词(KeyWords)： AZ80镁合金;预时效;形变热处理;组织;性能

Abstract:

Keywords:

基金项目(Foundation): 河南省教育厅自然科学研究计划项目(2010B430005);; 河南工业大学博士启动基金(2009BS011);河南工业大学科研基金(09XGG003)

作者(Author): 蔡刚毅,邓鹏辉,吴海宏

DOI: 10.13289/j.issn.1009-6264.2011.s1.028

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