周珊,孙有平,何江美,胡一杰

• 1:广西科技大学机械工程学院

摘要(Abstract)：

在250、300、400℃下分别对Al-0.75Mg-0.75Si-0.8Cu-0.7Zr合金进行大应变轧制变形,采用拉伸性能测试和扫描电镜(SEM)等研究了轧制温度对不同处理态合金显微组织和力学性能的影响。结果表明:在250℃轧制时,Al-0.75Mg-0.75Si-0.8Cu-0.7Zr合金的抗拉强度为204 MPa,伸长率为15.2%;随着轧制温度的升高,强度逐渐降低,而伸长率不断增大;合金经300℃热轧+510℃×80 min+195℃×13 h+冷轧加工后的晶粒最为细小,其综合力学性能最好,抗拉强度为475 MPa,伸长率为8.13%,断口上分布着大量细小均匀的韧窝。

关键词(KeyWords)： Al-0.75Mg-0.75Si-0.8Cu-0.7Zr合金;轧制温度;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51561004);; 广西自然科学基金(2016GXNSFDA380008);; 广西重点研发计划(桂科AC16380032);; 柳州市科学研究与技术开发计划(2016C050202,2017BD20301);; 广西科技大学研究生教育创新计划资助项目(GKYC201603)

作者(Author): 周珊,孙有平,何江美,胡一杰

DOI: 10.13289/j.issn.1009-6264.2018-0528

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