甘吉松,张大童,梁光兴,陈俊杰

• 1:华南理工大学国家金属材料近净成形工程技术研究中心
• 2:肇庆市端州区博得铝合金材料科技有限公司

摘要(Abstract)：

采用单辊熔体旋转法制备Al-10.7Zn-2.4Mg-0.9Cu合金带材,利用热挤压将带材坯料制成棒材,对其微观组织和力学性能进行研究。结果表明:所制备的带材由过饱和固溶体α(Al)等轴细晶构成,晶粒尺寸为3～5μm;合金经挤压后存在粗大第二相,析出相主要为MgZn_2相,挤压态棒材抗拉强度为499.8 MPa,伸长率达到了15.3%,断口呈韧性断裂特征;经T6热处理后,合金中有细小的沉淀相析出,使得室温力学性能得到提高,抗拉强度达到631.9 MPa,伸长率有所降低,断口呈韧脆混合断裂特征。

关键词(KeyWords)： Al-Zn-Mg-Cu铝合金;单辊熔体旋转法;热挤压;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 广东省自然科学基金团队项目(2015A030312003);; 广东省科技计划(2015B090926004)

作者(Author): 甘吉松,张大童,梁光兴,陈俊杰

DOI: 10.13289/j.issn.1009-6264.2019-0293

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