纪艳丽,郭富安,潘琰峰,钟皓

• 1:苏州有色金属研究院有限公司
• 2:上海交通大学材料科学与工程学院

摘要(Abstract)：

通过TEM及拉伸性能试验研究了较宽的预时效工艺参数(80~200℃,2~30 m in)下,A l-Mg-S i-Cu合金的组织及性能演变规律。研究表明:实验合金在80~200℃进行预时效处理,能够抑制自然时效的不利影响。在80℃×(2~30 m in)进行预时效后,材料烘烤硬化效应提高有限;在120~160℃预时效5~10 m in后,材料的烘烤硬化效应得到较大的提高,且材料烤漆前的屈服强度较低,有利于冲压成形;在更高的温度如200℃进行预时效时,材料烤漆前屈服强度过高,但此时材料的烘烤硬化效应提高尤为显著。T4P下GP区的尺寸对材料烘烤硬化效应的提高至关重要。

关键词(KeyWords)： Al-Mg-Si-Cu合金;预时效;烘烤硬化效应

Abstract:

Keywords:

基金项目(Foundation): 苏州市科技发展计划基金资助项目(SWH0906)

作者(Author): 纪艳丽,郭富安,潘琰峰,钟皓

DOI: 10.13289/j.issn.1009-6264.2010.02.024

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