毛萍莉,杨金龙,刘正,秦佳明,周野

• 1:沈阳工业大学材料科学与工程学院

摘要(Abstract)：

以Mg-4Zn-0.5Ca合金为研究对象,研究了Cu对Mg-4Zn-0.5Ca合金组织及力学性能的影响。结果表明,Cu可以通过与Zn原子结合形成Mg-Zn-Cu三元相在α-Mg基体边界富集,阻碍基体长大,使Mg-4Zn-0.5Ca合金铸态组织得到细化,合金主要由α-Mg,Ca2Mg6Zn3,Mg Zn Cu相组成。Cu元素可以提高Mg-4Zn-0.5Ca合金的硬度及抗拉强度,当Cu含量为1%时,铸态Mg-4Zn-0.5Ca-1Cu合金的抗拉强度和屈服强度分别为149 MPa、102 MPa,相对于基本合金提高了14.6%和29.1%,合金硬度提高18.8%至63 HV。过量的Cu会使合金中的析出相呈连续的网状分布在晶界上,导致力学性能的下降。

关键词(KeyWords)： Cu;镁合金;铸态组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 辽宁省创新团队项目(LT2013004);; 辽宁省科技攻关项目(2013201018)

作者(Author): 毛萍莉,杨金龙,刘正,秦佳明,周野

DOI: 10.13289/j.issn.1009-6264.2016.07.015

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