李东东,杨庆功,徐秋发,于雷,高克玮

• 1:中国运载火箭技术研究院
• 2:北京科技大学材料科学与工程学院

摘要(Abstract)：

采用化学成分分析、力学性能测试、热处理和显微组织观察等方法研究了7075铝合金零件阳极化后表面产生黑斑缺陷的原因。结果表明:黑斑缺陷对7075铝合金零件的力学性能有一定的影响;零件表面产生黑斑缺陷的原因是由于显微组织中存在较多的未溶质点相,其内因和外因分别是材料内部存在Zn、Cu、Mg元素偏析和零件本身热处理不均匀性;通过合适的重复热处理工艺可以消除零件表面的黑斑缺陷。

关键词(KeyWords)： 7075铝合金;黑斑缺陷;未溶质点;偏析;热处理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51271024)

作者(Author): 李东东,杨庆功,徐秋发,于雷,高克玮

DOI: 10.13289/j.issn.1009-6264.2018-0435

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