摘要轧制边裂的出现严重影响其后序的加工，尤其针对塑性较差的材料如镁合金、高牌号硅钢等，轧制边裂的现象更加严重。随着近几年经济的快速发展，轧制加工越来越普遍，所以一些钢厂的轧制边裂问题也亟待解决，以提高其经济价值。因此，研究轧制边裂问题，改善其轧制中轧制工艺参数和压下率等一些参数具有重要的实际意义和经济意义。本文利用有限元方法，结合塑性损伤模型首先通过对有限元模拟软件Marc的模型进行模拟分析得出最佳断裂准则模型，后根据实验室的实际情况输入计算机进行断裂模拟，得出断裂阈值，根据得出的断裂阈值，在实验室进行实际操作验证阈值。得到了以下结论：（1）MSC Marc中Cockraft-Latham模型适合模拟高牌号硅钢轧制；（2）板宽、摩擦对边部损伤没有影响；压下率、来料厚度对边部损伤有显著影响，边部损伤值随压下率的增加和来料厚度的减小而增大；（3）通过模拟结果和实验分析，得出高牌号硅钢出现边裂时，损伤值为0.17，当边部损伤小于0.17时不会发生边裂。71766

毕业论文关键词： 高牌号硅钢；边裂；有限元模拟

Abstract The occurrence of rolling edge cracks seriously affect the subsequent processing, especially for poor plastic materials such as magnesium alloy, high grade silicon steel, rolling edge crack phenomenon is more serious. With the rapid development of economy in recent years, rolling processing more and more common, so some steel mill rolling edge crack problem also need to be resolved to improve its economic value. Therefore, it is of great practical and economic significance to study the rolling edge crack problem and improve the rolling process parameters and the reduction rate in the rolling process. In this paper, the finite element method and the plastic damage model are used to simulate the model of the finite element simulation software. Finally, the fracture model is obtained according to the actual situation of the laboratory. The fracture threshold is obtained according to the actual situation of the laboratory. The resulting threshold for fracture is validated in the laboratory to verify the threshold. The results are as follows: (1) The Cockraft-Latham model of MSC Marc is suitable for the simulation of high grade silicon steel rolling; (2) plate width and friction have no effect on edge damage; the reduction rate and thickness of the material are significant (3) Through the simulation results and experimental analysis, it is concluded that the damage value of the high grade silicon steel is 0.17, while the edge damage value increases with the decrease of the reduction rate and the thickness of the incoming material. If the damage is less than 0.17, no edge cracking will occur.

KeyWords： High grade silicon steel；edge of Cracked；Finite element simulation

目 录

1 绪论 1

1.1 引言 1

1.2 硅钢边裂的研究现状 1

1.3 项目研究的目的与意义 5

1.4 项目研究的主要内容与技术路线 6

2 有限元模拟的建立及高牌号硅钢轧制试验 8

2.1 有限模拟的建立 8

2.1.1 几何模拟 8

2.1.2 材料参数的确定 11

2.1.3 材料属性的设定 12

2.1.4 接触条件 12

2.1.5 边界条件