王忠堂,户金科,袁建波

• 1:沈阳理工大学材料科学与工程学院

摘要(Abstract)：

对IN690高温合金管材挤压变形过程中的动态再结晶进行了模拟研究,获得了不同挤压工艺条件下动态再结晶与平均晶粒尺寸的变化规律。研究表明:在挤压速度和挤压比一定的条件下,随着挤压温度的升高,完全动态再结晶区域变大,平均晶粒尺寸增大;在挤压速度和挤压温度一定的条件下,随着挤压比的增大,完全动态再结晶区域变大,平均晶粒尺寸减小;管材壁厚方向上由内壁向外平均晶粒尺寸呈现先增大后减小的规律;平均晶粒尺寸的模拟值与实验值的相对误差小于12%。

关键词(KeyWords)： IN690;高温合金;动态再结晶;晶粒尺寸;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(51575366)

作者(Author): 王忠堂,户金科,袁建波

DOI: 10.13289/j.issn.1009-6264.2015.s2.039

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