杨康,祝志超,张雪姣,白亚冠,聂义宏,朱琳,展培培

• 1:天津重型装备工程研究有限公司
• 2:一重集团大连工程技术有限公司

摘要(Abstract)：

采用Gleeble-3500热模拟实验机和显微组织分析等研究了镍基617合金在不同温度及应变速率下的再结晶行为及其与变形参数间的变化规律,建立了合金的高温本构方程及动态再结晶方程。结果表明:合金的奥氏体动态再结晶体积分数及晶粒尺寸取决于变形温度及应变速率,温度升高,应变速率降低,奥氏体动态再结晶体积分数增大。当应变速率在0. 001～0. 1 s-1范围内及温度等于及高于1000℃时,各应变速率下合金都发生了动态再结晶。高温本构方程及动态再结晶方程可以描述合金在热变形过程中的应变及晶粒尺寸的变化,可为实际锻造过程中晶粒尺寸的控制提供指导。

关键词(KeyWords)： 镍基617合金;热变形;高温本构方程;动态再结晶

Abstract:

Keywords:

基金项目(Foundation): 国家能源应用技术研究及工程示范项目(NY20150101-1)

作者(Author): 杨康,祝志超,张雪姣,白亚冠,聂义宏,朱琳,展培培

DOI: 10.13289/j.issn.1009-6264.2019-0199

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