锻压技术

H13模具钢的热变形行为及本构模型建立

英文标题：Hot deformation behavior and establishment of constitutive model for H13 die steel

单位：1.山东大学机械工程学院高效洁净机械制造教育部重点实验室 2.山东大学机械工程国家级实验教学示范中心 3.青岛海信模具有限公司

分类号：TG142.1

出版年,卷(期):页码：2024,49(10):221-229

摘要：

为了改善H13模具钢的热加工性能和优化热成形工艺参数，利用Gleeble-3800热模拟试验机研究了H13模具钢在不同应变速率、变形温度和真应变范围内的热变形行为，并建立了应变补偿型Arrhenius和BP-ANN两种本构模型来描述H13模具钢的流动行为。结果表明，流动应力随着应变速率的降低和变形温度的升高而减小。通过比较两种已建立的本构模型的预测能力发现，Arrhenius模型和BP-ANN模型的相关系数分别为0.99536和0.99952,平均相对误差分别为3.58%和1.23%,而平均绝对误差分别为4.45641和1.37732,BP-ANN模型对H13模具钢高温流动应力的预测具有更好的准确性和稳定性。

In order to improve the hot working performance and optimize the hot forming process parameters for H13 die steel. the hot deformation behavior of H13 die steel under different strain rates, deformation temperatures and true strain ranges was studied by thermal simulation tester Gleeble-3800, and two kinds of constitutive model such as Arrhenius with strain compensation and BP-ANN were established to describe the flow behavior of H13 die steel. The results show that the flow stress decreases with the decreasing of strain rate and the increasing of deformation temperature. By comparing the prediction ability of two established constitutive models, it is found that the correlation coefficients of Arrhenius model and BP-ANN model are 0.99536 and 0.99952,the average relative errors are 3.58% and 1.23%, and the average absolute errors are 4.45641 and 1.37732, respectively. The BP-ANN model has better accuracy and stability in predicting the high-temperature flow stress of H13 die steel.

基金项目：

青岛市科技计划(24-1-2-qljh-10-gx);山东省泰山学者工程专项(ts201712002)

作者简介：呙程祥（1997-），男，硕士研究生,E-mail：202234368@mail.sdu.edu.cn;通信作者：张松（1969-），男，博士，教授,E-mail：zhangsong@sdu.edu.cn

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