韩念梅,冯迪,唐建国,耿哲,石皋莲

• 1:苏州工业职业技术学院精密制造工程系
• 2:江苏科技大学材料科学与工程学院
• 3:中南大学材料科学与工程学院
• 4:有色金属材料科学与工程教育部重点试验室

摘要(Abstract)：

采用差示扫描量热仪(DSC)、扫描电镜(SEM)、电子背散射衍射(EBSD)技术、常温拉伸、剥落腐蚀试验等研究了固溶处理对喷射成形7055铝合金组织和性能的影响。结果表明：随着固溶温度的升高，合金中粗大第二相面积分数逐渐减小，AlZnMgCu相和Al_2CuMg(S)相基本回溶，只残留少量的Al_7Cu_2Fe相，亚晶尺寸和再结晶面积分数随着固溶温度的升高和固溶时间的延长而增大，导致抗拉强度先增大后减小。合金经470℃固溶处理2 h+时效处理后，抗拉强度、伸长率和剥落腐蚀性能分别为613.4 MPa、8.9%和EB+级。喷射成形7055铝合金的静态再结晶机制包括“原有晶界弓出机制”和“亚晶合并机制”。

关键词(KeyWords)： 7055铝合金;喷射成形;固溶;再结晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51474240,51801082);; 江苏省高校基础科学研究重大项目(23KJA460012)

作者(Author): 韩念梅,冯迪,唐建国,耿哲,石皋莲

DOI: 10.13289/j.issn.1009-6264.2023-0447

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