刘腾蛟,文胜平,魏午,吴晓蓝,黄晖

• 1:北京工业大学材料科学与工程学院

摘要(Abstract)：

为研究不同加工工艺对Al-Er-Cu合金性能的影响,采用维氏硬度计、电导率测量仪和拉伸试验等研究了不同铸造温度、轧制工艺和时效工艺对合金性能的影响。结果表明:降低铸造温度增加了铝基体中残余的初生相数量,部分元素不再以溶质形式存在于基体中从而提高了其电导率;在轧制过程中增加固溶处理,在时效初期析出强化占主导地位提高了合金强度;在随后的时效过程中固溶的元素逐渐析出进一步提高电导率,但强度下降;双级时效工艺有利于Er、Cu元素的充分析出在保持强度的情况下提高电导率;通过降低铸造温度、在轧制过程中引入固溶处理、优化双级时效工艺获得了兼顾强度和电导率的Al-Er-Cu合金;对于705℃铸造制备的合金轧制后采用300℃×2 h+225℃×24 h 双级时效工艺处理后,硬度和电导率分别为57.6 HV0.05和61.19%IACS,抗拉强度达到179 MPa。

关键词(KeyWords)： Al-Er-Cu合金;电导率;时效

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2021YFB3700902)

作者(Author): 刘腾蛟,文胜平,魏午,吴晓蓝,黄晖

DOI: 10.13289/j.issn.1009-6264.2024-0469

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