廖凯,黄鑫,龚海,张萧笛,陈辉,钟利萍

• 1:中南林业科技大学机电工程学院
• 2:中南大学机电工程学院

摘要(Abstract)：

通过应力测试、硬度测试、扫描电镜观察和表面粗糙度实验分析了不同喷砂表面覆盖率对7075铝合金表面完整性的影响。结果表明:在喷砂表面强化过程下,随着覆盖率的提高,表面粗糙度稳定在1.9~2.2μm,表面硬化,且硬度稳步提升了约30%,压应力强度较喷砂前提高了约3倍,同时,改善了表层变形均匀性;覆盖率的提高,不仅提高表面完整性性能,而且对构件形状稳定有积极作用。对数据分析发现,400%覆盖率的喷砂件自然时效后变形回弹可控制在(3±3)μm以内,说明300%~400%覆盖率使材料表面完整性性能基本达到饱和状态。

关键词(KeyWords)： 7075铝合金;喷砂;表面完整性;表面覆盖率;表面强化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51475483);; 湖南省高校科技创新团队支持计划项目(2014207);; 湖南省重点研发计划(2018NK2065)

作者(Author): 廖凯,黄鑫,龚海,张萧笛,陈辉,钟利萍

DOI: 10.13289/j.issn.1009-6264.2018-0130

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