基于Arrhenius改进模型的无取向电工钢高温变形本构关系

doi:10.3901/JME.2016.04.090

机械工程学报 ›› 2016, Vol. 52 ›› Issue (4): 90-96.doi: 10.3901/JME.2016.04.090

基于Arrhenius改进模型的无取向电工钢高温变形本构关系

曹建国^{1, 2, 3}, 王天聪¹, 李洪波¹, 温盾⁴, 周云松⁴

1. 北京科技大学机械工程学院北京 100083;
2. 北京科技大学国家板带生产先进装备工程技术研究中心北京 100083;
3. 加州大学圣地亚哥分校雅各布斯工学院圣地亚哥 92093 美国;
4. 武汉钢铁(集团)公司武汉 430083

出版日期:2016-02-15 发布日期:2016-02-15
基金资助:
高等学校博士学科点专项科研基金(博导类)资助项目(20120006110015); 20150221收到初稿,20150722收到修改稿

High-temperature Constitutive Relationship of Non-oriented Electrical Steel Based on Modified Arrhenius Model

CAO Jianguo^{1, 2, 3}, WANG Tiancong¹, LI Hongbo¹, QIAO Yu³, WEN Dun⁴, ZHOU Yunsong⁴

1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083;
2. National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing 100083;
3. Jacobs School of Engineering, University of California-San Diego, San Diego 92093, USA;
4. Wuhan Iron & Steel (Group Company, Wuhan 430083

Online:2016-02-15 Published:2016-02-15

摘要/Abstract

摘要： 建立无取向电工钢热轧高温行为的统一本构关系模型。基于大型工业轧机取样的无取向电工钢连续冷却转变图分析测定,采用Gleeble热模拟试验机在750~1 120 ℃温度范围和0.05~10 s^-1应变速率范围进行热模拟试验。随着温度的降低,在1 120~975 ℃的奥氏体区,应力随之增加;975~875 ℃的奥氏体-铁素体两相区内,应力随之降低;875~750 ℃铁素体区内,应力随之增加;铁素体区以动态回复软化机制为主,而奥氏体区以动态再结晶为主,而且变形速率越大,动态再结晶越不明显,直至仅呈现动态回复型。基于Arrhenius改进模型框架,建立描述该钢种热连轧机粗轧机组和精轧机组完整轧制过程加工硬化与软化机制的统一本构关系,可精确地预测加工材料的属性。

关键词: 本构关系, 改进的Arrhenius模型, 热塑性变形, 数学模型, 无取向电工钢

Abstract: For hot rolling, a comprehensive constitutive model is developed for high-temperature behaviors of non-oriented electrical steels. Based on the analysis of CCT curves of non-oriented electrical steels from the industrial hot rolling mills, by using the Gleeble thermal stress-stain simulator, the current study is focused on the temperature range from 750 to 1 120 ℃and the strain rate range from 0.05 to 10 per second. As temperature is lowered, in the austenite region (1 120-975 ℃), the stress increases; in the austenite-ferrite region (975-875 ℃), the stress decreases; and in the ferrite region (875-750 ℃), the stress increases. In the ferrite region, dynamic recovery softening mechanism is most pronounced; in the austenite region, dynamic recrystallization tends to be the dominant process. If the deformation rate rises, dynamic recrystallization would be suppressed, and dynamic recovery would be promoted. In the framework of modified Arrhenius model, a constitutive relation is established describing the work hardening and softening mechanisms in the entire rolling procedure, which can predict quite precisely the properties of the processed materials.

Key words: constitutive relationship, mathematical model, modified Arrhenius model, non-oriented electrical steel, thermoplastic deformation

中图分类号:

TG331

曹建国, 王天聪, 李洪波, 温盾, 周云松. 基于Arrhenius改进模型的无取向电工钢高温变形本构关系[J]. 机械工程学报, 2016, 52(4): 90-96.

CAO Jianguo, WANG Tiancong, LI Hongbo, QIAO Yu, WEN Dun, ZHOU Yunsong. High-temperature Constitutive Relationship of Non-oriented Electrical Steel Based on Modified Arrhenius Model[J]. Journal of Mechanical Engineering, 2016, 52(4): 90-96.

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基于Arrhenius改进模型的无取向电工钢高温变形本构关系

High-temperature Constitutive Relationship of Non-oriented Electrical Steel Based on Modified Arrhenius Model

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