周超洋,吴光亮,刘新彬

• 1:中南大学资源加工与生物工程学院

摘要(Abstract)：

利用Gleeble-3500热模拟试验机,研究了含铌低合金高强钢在900~1100℃,应变速率为0.1、1和5 s-1,真应变至0.7的热压缩变形行为。基于实验数据,得到材料本构方程和表征动态再结晶的参数。运用Cingara-Mc Queen方程建模预测流变应力并验证。结果表明,高温低应变速率条件下动态再结晶是材料主要软化机理,峰值应力与Z参数成线性关系。由热加工图得到,当应变速率在0.1~0.67 s-1,温度在1030~1100℃范围内材料加工性能良好。

关键词(KeyWords)： 流变行为;含铌高强钢;动态再结晶;本构方程;热加工图

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51322405);; 湖南省研究生科研创新项目(CX2013B085)

作者(Author): 周超洋,吴光亮,刘新彬

DOI: 10.13289/j.issn.1009-6264.2016.08.037

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