陈忠伟,雷毅敏,张海方

• 1:西北工业大学凝固技术国家重点实验室

摘要(Abstract)：

以添加不同Mn含量的Al-4.6Cu-Mn合金为对象,利用FE-SEM、VNT Quant Lab-MG专业定量金相分析系统软件研究了不同冷却速率下Al-4.6Cu-Mn合金的二次枝晶间距、非平衡共晶相体积分数以及微观凝固组织形貌特征。结果表明:冷却速率在540～106 K.s-1范围时,随着冷却速率的提高,Al-4.6Cu-Mn合金非平衡共晶相体积分数随之降低,二次枝晶间距减小,非平衡共晶相形态细化;当Mn含量增加时,Al-4.6Cu-Mn合金中非平衡共晶相体积分数随之增大。

关键词(KeyWords)： Al-Cu-Mn合金;冷却速率;二次枝晶间距;微观组织;非平衡共晶相

Abstract:

Keywords:

基金项目(Foundation): 陕西省自然科学基金(SJ08-ZT05);; 航天支撑技术基金(2009年度)

作者(Author): 陈忠伟,雷毅敏,张海方

DOI: 10.13289/j.issn.1009-6264.2011.05.018

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