刘艳芬,卫英慧,侯利锋,李国栋,李永刚

• 1:太原理工大学材料科学与工程学院
• 2:吕梁学院

摘要(Abstract)：

通过Gleeble 1500D热力模拟实验机对HR3C奥氏体耐热钢进行单道次压缩试验,研究其高温变形行为。热变形温度为950~1250℃,应变速率范围0.001~1.0 s-1。结果表明,HR3C的流变应力随变形速率的降低和变形温度的升高而降低。变形温度越高,动态再结晶越容易发生;动态再结晶晶粒尺寸随温度的升高而增大,随变形速率的增大而减小。通过计算和回归分析得出HR3C钢的热激活能(558 k J/mol)和热变形本构方程;峰值应力与Z参数呈线性关系。

关键词(KeyWords)： 奥氏体耐热钢;流变应力;动态再结晶;热变形

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51001079,51208333);; 高等学校博士点专项科研基金(20091402110010);; 山西省科技重大专项(20111101053);; 山西省自然科学基金(2011011020-2,2013011012-3)

作者(Author): 刘艳芬,卫英慧,侯利锋,李国栋,李永刚

DOI: 10.13289/j.issn.1009-6264.2015.09.023

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