刘天翼,谭丽丽,赵红阳,杨柯

• 1:辽宁科技大学材料与冶金学院
• 2:中科院沈阳金属研究所

摘要(Abstract)：

用挤压轧制方法制备了厚度为1 mm的Mg-2Zn-0.5Nd-0.5Zr合金板材,并对板材进行后续退火和时效热处理,利用光学显微镜、扫描电镜、拉伸、电化学以及浸泡试验等研究了不同轧制温度和热处理对板材力学性能和耐蚀性能的影响。结果表明:轧制温度从280℃升高到330℃,合金中的Nd元素析出量减少,第二相形貌改变,板材塑性和耐蚀性提高,伸长率由9.1%提高到15.2%,腐蚀速率由0.48 mm/y降低到0.28 mm/y。退火后板材伸长率和耐蚀性均进一步提高,其中330℃+T2处理的合金板材的综合性能最好,其抗拉强度和屈服强度分别为235 MPa和158 MPa,伸长率为24.3%,腐蚀速率为0.12 mm/y。时效处理后,合金的晶界处有大量的析出相析出,第二相强化效果显著,330℃+T6组的抗拉强度和屈服强度最高,分别为275.8 MPa和255.5 MPa,但板材伸长率仅为7.6%,腐蚀速率升高到0.43 mm/y。

关键词(KeyWords)： 医用镁合金;轧制;热处理;力学性能;腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51971222,51801220)

作者(Author): 刘天翼,谭丽丽,赵红阳,杨柯

DOI: 10.13289/j.issn.1009-6264.2021-0228

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