| 引用本文: | 吴晋彬,刘国权,王承阳,许磊,王浩.钒氮微合金钢动态再结晶动力学及影响因素[J].材料科学与工艺,2011,19(1):85-90.DOI:10.11951/j.issn.1005-0299.20110117. |
| WU Jin-bin,LIU Guo-quan,WANG Cheng-yang,XU Lei,WANG Hao.Dynamic recrystallization kinetics and related influence factors of vanadium-nitride microalloyed steel during hot compressive deformation[J].Materials Science and Technology,2011,19(1):85-90.DOI:10.11951/j.issn.1005-0299.20110117. |
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| 摘要: |
| 为研究钒氮微合金钢的动态再结晶动力学及影响因素,选取3种对比成分的钒氮微合金钢发生动态再结晶的流变应力曲线,利用硬化速率-应力(θ-σ)曲线获得了饱和流变应力σsat、峰值应力σp、动态再结晶临界应力σc及稳态应力σss的准确值及上述特征应力值与σp的依赖关系,回归得到应变速率敏感的中碳钒氮微合金钢动态再结晶临界应变εc和峰值应变εp与Zener-Hollomon参数的关系式.建立了中碳钒氮钢及对比钢的热变形动态再结晶Avrami模型,分析了变形温度、应变速率和C及V、N含量对Avrami曲线的影响.结果表明:变速率比温度对中碳钒氮钢动态再结晶Avrami曲线的影响显著;C元素对中低碳钒氮微合金钢动态再结晶起促进作用;V和N对动态再结晶动力学的影响对应变速率比较敏感,高应变速率和低应变速率下元素的影响规律不同. |
| 关键词: 钒氮微合金钢 动态再结晶 Avrami模型 |
| DOI：10.11951/j.issn.1005-0299.20110117 |
| 分类号:TG142.1 |
| 基金项目:国家科技基础条件平台建设项目——材料科学数据共享网;VANITEC(钒国际技术委员会)资助项目 |
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| Dynamic recrystallization kinetics and related influence factors of vanadium-nitride microalloyed steel during hot compressive deformation |
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WU Jin-bin1, LIU Guo-quan1,2, WANG Cheng-yang1, XU Lei1, WANG Hao1
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1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China
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| Abstract: |
| To investigate the dynamic recrystallization kinetics of vanadium-nitride microalloyed steel during hot deformation and its influence factors,flow curves under dynamic recrystallization(DRX) conditions of 3 kinds of V-N microalloy steels were got by experiments so that the saturation stress σsat,peak stress σp,critical stress σc and steady-state stress σss were obtained from the θ-σ curve.Based on these.The relationships of critical strain εc and peak strain εp with the Zener-Hollomon parameter were obtained too by regression and an Avrami model for V-N microalloy steels was established.The effect of strain rate,temperature and content of C,V and N on Avrami model was studied.The results show that the strain rate has the most significant effect on Avrami curves of vanadium-nitride microalloyed steel under DRX than the temperature,and the carbon element promotes DRX for medium-carbon vanadium-nitride microalloyed steel.The influence of vanadium and nitride on DRX kinetics is sensitive to the strain rate and the influence rules are different under different strain rate. |
| Key words: V-N microalloy steel dynamic recrystallization Avrami model |
