谢尚恒,孙有平,何江美,朱嘉欣,方德俊

• 1:广西科技大学机械与汽车工程学院
• 2:广西土方机械协同创新中心
• 3:广西汽车零部件与整车技术重点实验室

摘要(Abstract)：

采用光学显微镜、X射线衍射(XRD)、扫描电镜(SEM)、布氏硬度计和电子万能试验机等研究了超低温轧制对2524铝合金板材显微组织和力学性能的影响。结果表明：超低温轧制后2524合金中主要存在S(Al_2CuMg)相、θ(Al_2Cu)相。超低温轧制使板材的晶粒尺寸变小，第二相粒子沿晶界分布，位错密度显著提高，位错强化效果显著。经超低温轧制后板材的抗拉强度和硬度分别为551 MPa和171 HBW,比室温轧制分别提高了69 MPa和21 HBW,但伸长率相比室温轧制有所降低。与室温轧制相比，超低温轧制后板材的织构强度减弱，织构类型也发生了变化，室温轧制板材织构类型为α织构，而超低温轧制后织构类型主要为Goss织构。

关键词(KeyWords)： 2524铝合金;超低温轧制;显微组织;织构;力学性能;位错强化

Abstract:

Keywords:

基金项目(Foundation): 中央引导地方科技发展专项(桂科ZY21195053);; 广西高等学校高水平创新团队项目(桂教师范[2019]52号);; 柳州市科技计划(2021CBA0102);; 广西研究生教育创新计划项目(YCSW2021323)

作者(Author): 谢尚恒,孙有平,何江美,朱嘉欣,方德俊

DOI: 10.13289/j.issn.1009-6264.2021-0477

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