董海峰,蔡大勇,王玉辉,杨庆祥,廖波

• 1:燕山大学亚稳材料科学与技术国家重点实验室

摘要(Abstract)：

采用Gleeble-3500热模拟机对一种含微量合金元素Cr、Mn、Ti的低碳钢在变形温度700~1050℃,应变速率0.01~0.1s-1条件下的热变形行为进行研究。结果表明:单相奥氏体区和铁素体区,峰值应力随变形温度的降低而升高,在两相区,峰值应力随着变形温度的降低而降低;在775~850℃与950~1050℃的温度区间,峰值应力的大小基本相当。建立了热加工图,并通过组织观察对其热加工图进行了解释。根据流变应力曲线,确定了试验低碳钢铁素体区的热变形激活能和热变形方程。

关键词(KeyWords)： Cr微合金化;低碳钢;热加工图;热变形方程

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金(E2007000374);; 河北省教育厅科学研究计划项目(2007147)

作者(Author): 董海峰,蔡大勇,王玉辉,杨庆祥,廖波

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