锻压技术

连铸大圆坯V形四砧径向锻造应力应变分析

英文标题：Analysis on strain and stress of V-shaped four-anvil radial forging for continuous casting round billet

作者：曹杰魏贤明李康汪开忠

分类号：TG316.2

出版年,卷(期):页码：2019,44(4):10-15

摘要：

为明确连铸大圆坯V形四砧径向锻造金属变形的特点，采用有限元分析软件Simufact模拟了四砧径向锻造过程，着重分析了锻件的变形渗透问题和心部轴向应力、平均应力的分布情况。四砧径向锻造锻件表层金属变形量较大，心部金属变形量较小，最小等效应变位于离端部一定距离的中心位置。锻造过程中，变形区心部的轴向应力为拉应力状态，心部轴向应力最大值随压下量的增加变化较小，在给定模拟条件下，锻件中心最大轴向拉应力为22 MPa。锻件在变形区的平均应力为负，变形区的应力状态为静水压力。锻件心部的静水压力明显小于表层，且随锻压压下量的增加，心部的静水压力增加，在给定模拟条件下，锻件中心最大静水压力为49 MPa。

In order to determine the deformation characteristics of V-shaped four-anvil radial forging for continuous casting round billet, the four-anvil radial forging process was simulated by finite element analysis software Simufact, and the deformation penetration problem and the distribution of axial stress and mean stress in the center of forgings were mainly analyzed. However, the surface metal deformation of forgings is large, and the deformation in the center is small, furthermore the minimum equivalent strain is in the center of a certain distance from the end. In the forging process, the axial stress in the center of deformation zone is tensile stress, and the maximum axial stress in the center changes slightly with the increasing of forging reduction. Under the given simulation condition, the maximum axial tensile stress in the center is 22 MPa, the mean stress in the deformation zone is negative, therefore, the stress state in the deformation zone is hydrostatic pressure. Furthermore, the hydrostatic pressure in the center of forgings is obviously smaller than that in the surface layer, and it increases with the increasing of forging reduction. Under the given simulation condition, the maximum hydrostatic pressure in the center of forgings is 49 MPa.

基金项目：

安徽省科技攻关计划项目（1501021003）；安徽省教育厅自然科学研究项目（KJ2013A061）

作者简介：曹杰（1971-），男，博士，副教授 E-mail：caojie910@ahut.edu.cn

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