王智祥,叶艳君,潘少彬,袁孚胜,陈文江,金熌

• 1:江西理工大学材料科学与工程学院
• 2:中国瑞林工程技术有限公司

摘要(Abstract)：

为了消除铸态Cu-3Si-2Ni合金中枝晶偏析及非平衡组织对其加工性能的影响,分别在850~950℃、保温2~8 h条件下对比研究了该合金在均匀化下的元素分布、显微组织及性能变化规律。结果表明:随温度的升高及保温时间的延长,合金的偏析程度及非平衡第二相组织明显减少,合金综合力学性能均得以提高和改善,其中温度对均匀化效果的影响更为显著;在相同加热条件下,合金中Ni比Si的扩散速度更慢。并在此基础上利用扩散理论建立起相应的Ni元素均匀化动力学方程。经验证,实验值与理论计算结果基本吻合,获得该合金较佳的均匀化退火工艺为900℃×4 h。

关键词(KeyWords)： 均匀化;扩散;枝晶偏析

Abstract:

Keywords:

基金项目(Foundation): National Natural Science Foundation of China(51161008)

作者(Author): 王智祥,叶艳君,潘少彬,袁孚胜,陈文江,金熌

DOI: 10.13289/j.issn.1009-6264.2016.10.015

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