李浩宇,董建新,李林翰

• 1:北京科技大学材料科学与工程学院

摘要(Abstract)：

采用OM、SEM及EDS研究了均匀化处理对铸态GH4738合金的晶粒尺寸、偏析程度、组织及热变形行为的影响,分析了经热压缩变形实验后合金的偏析程度、晶粒尺寸,以及再结晶程度,并绘制应力应变曲线,考察合金的变形抗力。结果表明,均匀化处理过程中,样品晶粒直径增大,偏析程度减小。部分均匀化处理后的样品,再结晶程度较高,变形抗力较小。建议采取部分均匀化处理的方式,保留少量的枝晶组织在样品中,这样既可节约能源,又可提高开坯的再结晶率。

关键词(KeyWords)： 高温合金;均匀化;枝晶;再结晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571012)

作者(Author): 李浩宇,董建新,李林翰

DOI: 10.13289/j.issn.1009-6264.2017.03.010

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