封爱成,卢雅琳,张扬,李兴成,徐文婷

• 1:江苏理工学院材料工程学院
• 2:江苏省先进材料设计与增材制造重点实验室

摘要(Abstract)：

通过向AZ31合金中加入不同含量的CaO,在均匀化处理后进行热挤压,研究CaO添加量对挤压态AZ31镁合金微观组织和力学性能的影响。结果表明:CaO与AZ31熔体发生反应,并生成Al2Ca相;CaO的添加有效细化AZ31镁合金挤压前后的微观组织;合金的力学性能随CaO含量的升高而逐渐提高,当CaO添加量为1%时,屈服强度和抗拉强度分别达到219 MPa和311 MPa,与AZ31合金相比分别提高了28.6%和17.3%。添加CaO带来的再结晶程度升高和晶粒细化,是强度改善的主要原因。

关键词(KeyWords)： CaO;AZ31镁合金;热挤压;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51601076);; 江苏省高校自然科学研究面上项目(16KJB430013);; 江苏省高校自然科学研究重大项目(17KJA430005)

作者(Author): 封爱成,卢雅琳,张扬,李兴成,徐文婷

DOI: 10.13289/j.issn.1009-6264.2017-0403

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