徐春杰,马东,李岩,任国璐,张忠明

• 1:西安理工大学材料科学与工程学院
• 2:西安谢赫特曼诺奖新材料研究院

摘要(Abstract)：

采用光学显微镜、扫描电镜、X射线衍射仪和显微硬度计等研究了多级不同时效处理对7055铝合金经三级固溶处理后的组织和力学性能的影响。结果表明,三级固溶处理后7055铝合金的组织主要存在MgZn_2和Al_2CuMg相,时效处理并未改变合金的相组成,但三级时效处理组织中MgZn_2相显著增多;同时,时效处理可以改善7055铝合金的各向异性,提高合金的力学性能。合金的最佳热处理工艺方案为:三级固溶(450℃×2 h)+(465℃×1 h)+(475℃×1.5 h)和三级时效处理(120℃×24 h)+(175℃×1.5 h)+(120℃×24 h),此时合金的硬度、抗拉强度、屈服强度和伸长率分别为195.2 HV0.5、673 MPa、621 MPa和10.24%。

关键词(KeyWords)： 铝合金;时效处理;固溶处理;组织与性能;各向异性

Abstract:

Keywords:

基金项目(Foundation): 陕西省重点研发计划(一般项目-工业领域)项目(2017GY-135)

作者(Author): 徐春杰,马东,李岩,任国璐,张忠明

DOI: 10.13289/j.issn.1009-6264.2019-0498

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