李旭阳,贺俊光,郜清磊,文九巴

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心

摘要(Abstract)：

采用扫描电镜、X射线衍射仪、电子万能试验机和电化学工作站等研究了490℃固溶处理不同时间(4、8和12 h)对铸态Mg-1.5Zn-0.3Zr-0.2Ca-2Nd合金显微组织、力学性能以及耐腐蚀性能的影响。结果表明：随着固溶处理时间的增加，合金中沿晶界分布的连续网状第二相逐渐溶入α-Mg基体，使得显微组织趋于均匀，平均晶粒尺寸也略有增大；当固溶时间达到8 h时，合金中第二相的体积分数由铸态的3.22%显著降低至1.21%,同时平均晶粒尺寸由81.91μm增大至95.65μm,此时合金表现出较为优异的力学性能和耐腐蚀性能，其抗拉强度、屈服强度、伸长率以及平均腐蚀速率分别为195 MPa、126 MPa、7.3%和0.81 mm/y。

关键词(KeyWords)： Mg-1.5Zn-0.3Zr-0.2Ca-2Nd合金;固溶时间;显微组织;力学性能;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 河南省自然科学基金(242300420018)

作者(Author): 李旭阳,贺俊光,郜清磊,文九巴

DOI: 10.13289/j.issn.1009-6264.2024-0555

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