陈阳,邹德宁,佟立波,赵洁,沈楚,赵旭

• 1:西安建筑科技大学冶金工程学院

摘要(Abstract)：

利用光学显微镜、X射线衍射仪、扫描电镜、Vickers硬度计及拉伸试验机等观察并研究了添加Ca和Sr元素及热处理工艺对ZK61镁合金组织和力学性能的影响。结果表明:单独添加Ca元素时,在ZK61-xCa合金α-Mg基体上析出了形状不规则的MgZn和MgZn_2相;复合添加Ca、Sr元素时,在α-Mg基体上形成了沿晶界分布的Mg_(17)Sr_2新相。当固溶温度和时间为350℃×12 h,时效温度和时间为200℃×12 h时,合金的组织与性能达到最优。当元素Ca=1.0%,Sr=0.5%时,热处理后合金的性能最优,其抗拉强度为141.9 MPa,伸长率为15.6%,维氏硬度为51.6 HV。

关键词(KeyWords)： Mg-Zn-Zr合金;钙锶合金化;热处理;抗拉强度

Abstract:

Keywords:

基金项目(Foundation): 陕西省重点研发计划-工业领域(2018ZDXM-GY-149)

作者(Author): 陈阳,邹德宁,佟立波,赵洁,沈楚,赵旭

DOI: 10.13289/j.issn.1009-6264.2019-0390

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