Numerical simulation and experimental research on cracking mechanism of twin-roll strip casting

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

High Temperature Materials and Processes Pub Date : 2022-01-01 DOI:10.1515/htmp-2022-0251

Zheng-feng Lv, Zhou-Yi Yang, Jian-Yu Zhang, Xueting Li, P. Ji, Qiangfang Zhou, Xiliang Zhang, Yinping Shi

引用次数: 0

Abstract

Abstract Based on the three-dimensional field of molten pool and twin-roll strip casting experiments, this work verified the cracking mechanism of the strip by establishing mathematical model and rolling experiments. The results showed that due to the instability of the thermophysical field of the molten pool and the inconsistency of kiss curve height, the newly solidified strip will undergo incompatible deformation through the rolling. The stress concentration will appear around the large reduction area and then form slip bands. When plastic strain exceeds the limit of the metal, the oblique cracks will appear in the slip bands periodically or completely penetrate the strip. In addition, tensile cracks could also be produced by incompatible deformation. Therefore, keeping the uniformity and stability of the thermal physical field in molten pool is the key factor to restrain cracks.

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双辊带钢连铸开裂机理的数值模拟与试验研究

摘要基于熔池三维流场和双辊铸轧实验，通过建立数学模型和轧制实验，验证了带钢的开裂机理。结果表明，由于熔池热物理场的不稳定性和kiss曲线高度的不一致性，新凝固的带材在轧制过程中会发生不相容变形。应力集中将出现在大的折减区周围，然后形成滑移带。当塑性应变超过金属的极限时，滑移带中会周期性地或完全地出现倾斜裂纹。此外，不相容变形也可能产生拉伸裂纹。因此，保持熔池热物理场的均匀性和稳定性是抑制裂纹的关键。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Temperature Materials and Processes 工程技术-材料科学：综合

CiteScore

2.50

自引率

0.00%

发文量

审稿时长

3.9 months

期刊介绍： High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.