| Nb对低碳微合金钢动态再结晶行为的影响 |
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| 引用本文： | 商艳,郭盈利,丁桦. Nb对低碳微合金钢动态再结晶行为的影响[J]. 金属热处理, 2012, 37(4): 11-15 |
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| 作者姓名： | 商艳 郭盈利 丁桦 |
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| 作者单位： | 1. 沈阳理工大学材料科学与工程学院,辽宁沈阳,110159
2. 东北大学材料与冶金学院,辽宁沈阳,110168 |
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| 摘 要： | 利用Gleeble-1500热模拟试验机研究了3种含铌或不含铌低碳钢在850～1150℃,应变速率分别为0.05、1、10 s-1条件下的热变形行为。采用应变硬化速率-应力(θ-σ)曲线图较精确地获得了C-Mn钢的流变应力和峰值应力;用-dθ/dσ-σ曲线获取了含Nb试验钢的应变和应力值;用回归法确定了双曲线本构方程中的变形激活能,确定了3种试验钢发生动态再结晶的激活能分别为234.867、261.276、301.751 kJ/mol。随Nb含量的增加,试验钢的再结晶激活能逐渐升高。
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| 关 键 词： | Nb 低碳微合金钢 热变形 应力-应变曲线 动态再结晶 激活能 |
Effect of Nb on dynamic recrystallization behavior of low carbon microalloyed steel |
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| SHANG Yan,GUO Yingli,DING Hua. Effect of Nb on dynamic recrystallization behavior of low carbon microalloyed steel[J]. Heat Treatment of Metals, 2012, 37(4): 11-15 |
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| Authors: | SHANG Yan GUO Yingli DING Hua |
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| Affiliation: | 1.School of Material Sciences and Technology,Shenyang Ligong University,Shenyang Liaoning 110159,China;2.School of Material and Metallurgy,Northeastern University,Shenyang Liaoning 110168,China) |
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| Abstract: | The hot deformation behaviors of three kinds of low carbon steel microalloyed with Nb were investigated with compression test on Gleeble-1500 simulator at a temperature range of 850-1150 ℃ and strain rate of 0.05,1,10 s-1.The flow stress and peak stress of C-Mn steel were gained by θ-σ curves,and the dynamic recrystallization parameters of low carbon steel microalloyed with Nb gained through-dθ/dσ-σ curves and the deformation activation energy of the three tested steel were determined by regression,they were 234.867,261.276,301.751 kJ/mol,respectively.With the increasing of Nb content,the dynamic recrystallization activation energy of tested steels is increased gradually. |
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| Keywords: | Nb low carbon microalloyed steel hot deformation stress-strain curve dynamic recrystallization activation energy |
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