2Cr11Mo1VNbN钢再结晶动力学方程及本构方程的建立

陈宇翔1,2,李涛1,龚志华1,2,赵吉庆2,杨钢2

钢铁研究学报 ›› 2020, Vol. 32 ›› Issue (2) : 150-158.

钢铁研究学报 ›› 2020, Vol. 32 ›› Issue (2) : 150-158. DOI: 10.13228/j.boyuan.issn1001-0963.20190117
材料研究

2Cr11Mo1VNbN钢再结晶动力学方程及本构方程的建立

  • 陈宇翔,李涛,龚志华,赵吉庆,杨钢
作者信息 +

Establishment of recrystallization kinetics equation and constitutive equation of 2Cr11Mo1VNbN steel

  • CHEN Yu-xiang,LI Tao,GONG Zhi-hua,ZHAO Ji-qing,YANG Gang
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文章历史 +

摘要

摘要:采用Gleeble-3800热模拟试验机,在温度为1000~1200℃、应变速率为0.01~1s-1和变形量为70%的条件下研究了2Cr11Mo1VNbN钢的热变形行为,建立了动态再结晶型本构模型以及动态再结晶体积分数模型。结果表明:2Cr11Mo1VNbN钢在高温小应变速率的变形条件下易发生动态再结晶,计算得出2Cr11Mo1VNbN钢发生动态再结晶时的临界应变以及变形激活能并得到了动态再结晶体积分数模型,最终构建出的动态再结晶型本构方程能良好地描述2Cr11Mo1VNbN钢的高温流变行为。

Abstract

Abstract:The hot deformation behavior was investigated using the thermal simulation testing machine of Gleeble-3800 type in 2Cr11Mo1VNbN steel. The experimental temperature was in the range of 1000-1200℃ and the strain rate changing from 0.01s-1 to 1s-1 with an ultimate deformation about 70%. Related models were established for dynamic recrystallization constitutive equation and dynamic recrystallization fraction. The experimental results indicate that the dynamic recrystallization can occur more easily under the conditions with higher temperature and lower strain rate. The critical strain and deformation activation energy for the occurrence of dynamic recrystallization in 2Cr11Mo1VNbN steel were calculated and the dynamic curves reflecting the change process of recrystallization volume fraction were obtained. Ultimately, the dynamic recrystallization constitutive equation was established and it could properly describe rheological behavior of 2Cr11Mo1VNbN steel at high temperature.

关键词

关键词:耐热钢 / 热变形 / 动态再结晶 / 动力学模型 / 本构方程

Key words

Key words:heat-resistant steel / hot deformation / dynamic recrystallization / dynamic model / constitutive equation

引用本文

导出引用
陈宇翔1,2,李涛1,龚志华1,2,赵吉庆2,杨钢2. 2Cr11Mo1VNbN钢再结晶动力学方程及本构方程的建立[J]. 钢铁研究学报, 2020, 32(2): 150-158 https://doi.org/10.13228/j.boyuan.issn1001-0963.20190117
CHEN Yu-xiang1,2,LI Tao1,GONG Zhi-hua1,2,ZHAO Ji-qing2,YANG Gang2. Establishment of recrystallization kinetics equation and constitutive equation of 2Cr11Mo1VNbN steel[J]. Journal of Iron and Steel Research, 2020, 32(2): 150-158 https://doi.org/10.13228/j.boyuan.issn1001-0963.20190117

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