锻压技术

基于修正的Archard磨损理论模型的H13模具钢热挤压磨损研究

英文标题：Study on hot extrusion wear of H13 die steel based on modified Archard wear theory model

作者：皇涛宋宇张丹丹张丰收宋克兴

分类号：TG376

出版年,卷(期):页码：2019,44(9):160-166

摘要：

为精确预测模具钢在热挤压成形过程中的磨损规律，开展了基于修正的Archard磨损理论模型的H13模具钢热挤压磨损研究。根据磨损因子及硬度的变化修正了Archard磨损理论模型，同时考虑挤压次数对模具磨损的影响，基于Deform建立了热挤压成形有限元模型。研究了磨损因子、硬度以及挤压次数对模具磨损的影响规律，挤压初期凸模磨损量较小；随挤压次数增加，磨损量迅速增加；挤压到一定次数时，磨损量出现转折，随后呈平稳变化。建立了H13模具钢热挤压磨损预测模型，通过热挤压物理试验验证了磨损预测模型的可靠性。研究成果为H13热作模具钢热挤压成形模具寿命的预测提供了理论依据。

In order to predict the wear law of die steel during hot extrusion process accurately, the study on hot extrusion wear of H13 die steel based on modified Archard wear theory model was conducted. According to the change of wear factor and hardness, the Archard wear theory model was modified, and considering the influence of extrusion times on die wear, the finite element model of hot extrusion was established by Deform. Then, the influence laws of wear factor, hardness and extrusion times on die wear were studied. Furthermore, the punch wear amount is small at the beginning of extrusion, and then it increases rapidly with the increasing of extrusion times. When the extrusion is up to a certain number of times,
the wear amount turns and then changes smoothly. Finally, the prediction model of hot extrusion wear for H13 die steel was established, and the reliability of the prediction model was verified by hot extrusion physical test. The research results provide a theoretical basis for predicting the die life during hot extrusion process for H13 hot-working die steel.

基金项目：

国家重点研发计划资助项目（2017YFB0306400，2016YFB0300400）；国家自然科学基金资助项目（51875176，51741503）；中国博士后科学基金资助项目（2016M590677）；河南省自然科学基金资助项目(162300410085)

皇涛（1983-），男，博士，讲师 E-mail：huangtao@haust.edu.cn 通讯作者：张丰收（1972-），男，博士，教授 E-mail：fengshouzhang@163.com

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