郭锋,贾岳

• 1:内蒙古工业大学材料科学与工程学院

摘要(Abstract)：

通过对时效硬度的测定和时效过程的差示扫描量热(DSC)曲线的分析,研究了稀土对6063铝合金时效硬度和时效动力学的影响。结果表明,稀土的适量加入能提高6063铝合金的时效硬度,但加入量过大会使强化相减少,合金时效硬度下降。稀土的引入会使过渡相β″和强化相β(Mg2Si)的析出被推迟与抑制,其原因在于稀土形成含硅化合物降低了基体中溶解态Si的浓度,增加了β″相和β相析出所需的Si元素扩散时间,同时稀土还提高了β相析出的激活能。

关键词(KeyWords)： 6063铝合金;稀土;时效激活能;时效硬度

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 郭锋,贾岳

DOI: 10.13289/j.issn.1009-6264.2012.s2.010

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