锻压技术

SUS409不锈钢自由曲面件冲压成形回弹预测

英文标题：Springback prediction on stamping of free-form surface parts for SUS409 stainless steel

作者：梁卫抗袁嵘王艺川刘琼司军辉王乾廷

单位：1.福建理工大学材料科学与工程学院118 2.福建省新材料制备与成形技术重点实验室 3.福建省精确成型制造工程研究中心 4.福建省模具工程技术研究中心 5.厦门理工学院材料科学与工程学院

分类号：TG386

出版年,卷(期):页码：2025,50(6):57-66

摘要：

针对汽油机消声器壳体用SUS409不锈钢在成形中存在的回弹问题，以自由曲面件为对象，通过单轴拉伸实验和数字图像相关法获得SUS409不锈钢的真实应力-真实应变曲线，得到Yld2000-2d和Hill48屈服准则及Voce硬化模型的关键参数，构建了SUS409不锈钢的本构模型。利用开发的VUMAT子程序研究保压时间、成形路径对自由曲面件回弹的影响规律。结果表明：自由曲面件的回弹量随着保压时间和成形路径循环次数的增加而降低，且保压时间影响较大；Yld2000-2d屈服准则预测结果与实验结果的误差均小于Hill48屈服准则的误差，能够更好地预测SUS409不锈钢自由曲面件回弹量的分布规律。

Aiming at the issue of springback in the forming of SUS409 stainless steel for muffler shell of gasoline engine, for the free-form surface parts, the true stress- true strain curves of SUS409 stainless steel were obtained by uniaxial tensile tests and digital image correlation method. The key parameters of the Yld2000-2d and Hill48 yield criteria and the Voce hardening model were given to construct the constitutive model of SUS409 stainless steel. Then, the influence laws of holding time and forming path on the springback of free-form surface parts were investigated by developed VUMAT subroutine. The results indicate that the springback amount of free-form surface parts decreases with the increasing of holding time and forming path cycle numbers, and the holding time has a greater impact. The error between the results predicted by the Yld2000-2d yield criterion and the experimental results is smaller than that of the Hill48 yield criterion. Thus, the springback amount distribution laws of free-form surface parts for SUS409 stainless steel can be better predicted by the Yld2000-2d yield criterion.

基金项目：

福建省科技计划区域发展项目 (2023H4021)；福建省创新资金资助项目（2023C0060）；宁德市产学研项目（2021C004）；福建省人社厅项目（GYZ21219）;福建省科技计划高校产学合作项目（2023H6035，2023H6036）；福建省科技计划STS项目 (2023T3060)

作者简介：梁卫抗（1985-），男，博士，副教授 E-mail：lwkhfut1998@163.com 通信作者：王乾廷（1977-），男，博士，教授 E-mail：wqt@xmut.edu.cn

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