康娅雪,蔡大勇,张春玲,董海峰,王玉辉

• 1:燕山大学亚稳材料制备技术与科学国家重点实验室
• 2:燕山大学环境与化学工程学院

摘要(Abstract)：

采用Gleeble-3500热模拟试验机研究了微碳钢在700～1100℃、0.01～10 s-1条件下的热变形行为。确定了其在铁素体区和奥氏体区的热变形方程。建立了微碳钢在不同应变量下的热加工图(Processing Map)。结果表明,在铁素体区和奥氏体区,试验钢的峰值应力大小基本相当;试验钢在铁素体区和奥氏体区的热变形激活能分别为302 kJ/mol和353 kJ/mol;不同真应变下的热加工图相似,当变形温度为875℃,应变速率为0.01 s-1时,能量消耗效率达到最大值为0.5。

关键词(KeyWords)： 微碳钢;热变形方程;热加工图

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金资助项目(E2009000456)

作者(Author): 康娅雪,蔡大勇,张春玲,董海峰,王玉辉

DOI: 10.13289/j.issn.1009-6264.2012.06.017

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