钟鼓,邱楚,吴志斌,李新涛,长海博文

• 1:中铝科学技术研究院
• 2:苏州有色金属研究院有限公司

摘要(Abstract)：

通过分析比较共晶硅和析出相的数量、尺寸、形貌变化,研究了均匀化温度、均匀化时间和均匀化后的冷却速率对A390铝合金微观组织演变及布氏硬度的影响规律。结果表明:析出相的析出数量增加是均匀化处理后A390铝合金布氏硬度降低的主要原因,而共晶硅尺寸、形貌的改变对其影响较小。合金中析出相的析出数量主要受均匀化处理后的冷却速率影响,同一均匀化温度和时间下,随均匀化冷却速率的减小,析出相数量增多,布氏硬度迅速降低。均匀化处理后,共晶硅熔断粒化,Al2Cu相发生分解和球化,Al5Cu2Mg8Si6相数量增加。

关键词(KeyWords)： A390铝合金;均匀化;微观组织;共晶硅;布氏硬度

Abstract:

Keywords:

基金项目(Foundation): 中色科技股份有限公司科技发展计划项目(KF2012004)

作者(Author): 钟鼓,邱楚,吴志斌,李新涛,长海博文

DOI: 10.13289/j.issn.1009-6264.2014.08.008

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