基于各向异性的薄带冷轧变形区接触压力模型研究

doi:10.3901/JME.2025.08.127

机械工程学报 ›› 2025, Vol. 61 ›› Issue (8): 127-137.doi: 10.3901/JME.2025.08.127

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基于各向异性的薄带冷轧变形区接触压力模型研究

李伟^1,2, 黄紫藤^1,2, 李松松^1,2, 于辉^1,2, 罗许³

1. 燕山大学机械工程学院秦皇岛 066004;
2. 燕山大学国家冷轧板带装备及工艺工程技术研究中心秦皇岛 066004;
3. 攀钢集团攀枝花钢铁研究院有限公司攀枝花 617000

收稿日期:2024-04-22 修回日期:2024-09-25 出版日期:2025-04-20 发布日期:2025-05-10
作者简介:李伟，男，1995年出生，博士。主要研究方向为薄板带轧制变形理论。E-mail：liweiaedu@163.com;黄紫藤，女，2000年出生，硕士研究生。主要研究方向为机械超材料变形理论。E-mail：hziteng1002@163.com;李松松，男，1995年出生，博士研究生。主要研究方向为复合板轧制变形理论。E-mail：lss1252965104@163.com;于辉(通信作者)，男，1974年出生，教授，博士研究生导师。主要研究方向为金属加工成形机理及工艺优化。E-mail：yuhui@ysu.edu.cn;罗许，男，1982年出生，博士，教授级高级工程师。主要研究方向为材料加工工艺、钒钛新材料开发。E-mail：18982379352@163.com
基金资助:
河北省自然科学基金(E2021203237)和中央引导地方科技发展资金(216Z1002G)资助项目。

Research on Contact Pressure Model of Cold Rolled Deformation Zone of Thin Strip Based on Anisotropy

LI Wei^1,2, HUANG Ziteng^1,2, LI Songsong^1,2, YU Hui^1,2, LUO Xu³

1. College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004;
2. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004;
3. Panzhihua Steel Group Panzhihua Iron and steel Research Institute Co., Ltd., Panzhihua 617000

Received:2024-04-22 Revised:2024-09-25 Online:2025-04-20 Published:2025-05-10

摘要/Abstract

摘要： 传统薄带轧制变形区理论中常将轧件假设为理想的各向同性材料，而并未考虑材料本身或后续处理过程中所引入的各向异性问题，导致理论预测精度大幅降低的同时也给后续工艺的合理制定带来巨大困难。为此采用理论分析、数值模拟和实验验证相结合的手段开展了屈服应力取值合理性和屈服判据差异性对变形区接触特征影响规律的研究。结果表明：屈服应力的不合理取值和屈服判据的差异会导致变形区轮廓、各分区临界点坐标和实际压下率等大幅偏离实际，表现为屈服应力取值更高的轧件的中性区出现得更早且宽度占比更大，而Mises各向同性屈服判据时等效应力的判别结果要比Hill48正交各向异性判据更早达到轧件屈服。以RD拉伸屈服应力为参考，由各向异性系数所修正的变形区接触压力模型能够较好地预测各向异性薄带轧制变形区的接触特征。

关键词: 薄带材, 轧制, 变形区理论, 屈服准则, 各向异性

Abstract: In the traditional thin strip rolling deformation zone theory, the rolling parts are often assumed to be ideal isotropic materials, without considering the anisotropy problem introduced in the material itself or the subsequent processing, which significantly reduces the accuracy of theoretical predictions and creates significant challenges for the rational formulation of the subsequent process. Therefore, to investigate the influence of the differences in yield criteria and the rationality of yield stress on the contact characteristics of the deformation zone, a combination of the theoretical analysis, numerical simulation, and experimental verification is used. The results show that the unreasonable value of yield stress and the difference of yield criterion will result in a significant deviation from the reality of the deformation zone profile, the coordinates of the critical point of each zone, and the actual compression rate. The neutral zone of the rolled piece with higher yield stress value appears earlier and the width proportion is larger, and the discrimination result of the equivalent stress of the MISES isotropic yield criterion reaches the yield of the rolled piece earlier than that of the HILL48 orthotropic criterion. The contact characteristics of the rolling deformation zone of the anisotropic thin strip can be more accurately predicted by the contact pressure model of the deformation zone modified by the anisotropy coefficient, using the RD tensile yield stress as a reference.

Key words: thin strip, rolling, deformation zone theory, yield criterion, anisotropy

中图分类号:

TG331

李伟, 黄紫藤, 李松松, 于辉, 罗许. 基于各向异性的薄带冷轧变形区接触压力模型研究[J]. 机械工程学报, 2025, 61(8): 127-137.

LI Wei, HUANG Ziteng, LI Songsong, YU Hui, LUO Xu. Research on Contact Pressure Model of Cold Rolled Deformation Zone of Thin Strip Based on Anisotropy[J]. Journal of Mechanical Engineering, 2025, 61(8): 127-137.

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基于各向异性的薄带冷轧变形区接触压力模型研究

Research on Contact Pressure Model of Cold Rolled Deformation Zone of Thin Strip Based on Anisotropy

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