蒙毅,孙健,赵志浩,崔建忠,朱远志

• 1:北方工业大学机械与材料工程学院
• 2:东北大学材料电磁过程研究教育部重点实验室

摘要(Abstract)：

采用显微组织观察、扫描电镜及能谱分析、透射电镜分析、DSC热差分析、JMat Pro 5.0软件计算和室温力学性能测试,对低频电磁铸造新型高强Al-Mg-Si-Cu合金铸态、挤压态和T6态的组织与力学性能进行研究,获得该合金的最佳Cu含量。结果表明,Cu含量的变化对该合金过烧温度影响很小,不同含Cu量的该类合金进行均匀化处理和固溶处理时温度可相同。Cu在该合金铸态组织中除了形成球状AlMgSiCu相外,含Cu相还可与其他相结合形成球状共晶组织。Cu对合金再结晶行为的影响很小。随Cu含量的增加,合金T6态试样中Q'析出强化相的数量增加,同时该合金挤压棒材T6态试样的强度和伸长率也增加。在限定的元素含量范围内,提高Cu含量至1.0 mass%,合金的强韧性可达到最佳状态。

关键词(KeyWords)： 铝合金;高强;显微组织;Cu

Abstract:

Keywords:

基金项目(Foundation): 北京市优秀人才培养资助青年骨干个人项目(2015000020124G023);; 北方工业大学“优秀青年教师培养计划”项目(XN072-017);北方工业大学科研启动基金(1100000156041-2015)

作者(Author): 蒙毅,孙健,赵志浩,崔建忠,朱远志

DOI: 10.13289/j.issn.1009-6264.2017-0084

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