锻压技术

新型耐热钢G115大口径无缝管挤压模拟

英文标题：Simulation of extrusion for large-diameter seamless tube of new heat-resistant steel G115

单位：1.中国钢研科技集团钢铁研究总院有限公司 2.德国sunCAE咨询公司 3.广西科技大学机械与汽车工程学院 4.内蒙古北方重工业集团有限公司

分类号：TG335.6

出版年,卷(期):页码：2025,50(3):120-127

摘要：

为提高G115马氏体耐热钢产品质量、优化工艺流程、节约研发时间和成本，采用通用有限元软件ABAQUS对G115钢大口径无缝管挤压过程进行模拟，使用任意拉格朗日欧拉(Arbitrary LagrangianEulerian)公式的数值模型解决了模拟超大塑性变形的难点，同时建立了准确的摩擦模型和考虑各种影响因素的材料模型，通过对比仿真与试验结果，验证了模型的准确性，并研究了初始挤压温度和挤压速度、摩擦因数、最大剪应力对挤压的影响。结果表明：随着初始挤压温度的提高，所需挤压力下降；挤压速度越大，所需挤压力越大；摩擦因数、最大剪应力与挤压力均为正相关关系。

In order to improve the product quality, optimize the process flow and save the research and development time and cost of G115 martensitic heat-resistant steel, the extrusion process of large-diameter seamless tube of G115 steel was simulated by finite element software ABAQUS, and the difficulty of simulating super-large plastic deformation was solved by using the Arbitrary Lagrangian-Eulerian (ALE) formulation. Then, an accurate friction model and a material model considering various influencing factors were established, and the accuracy of the model was verified by comparing the simulation and experimental results. Furthermore, the influences of initial extrusion temperature, extrusion speed, friction factor and maximum shear stress on the extrusion were studied. The results show that with the increasing of initial extrusion temperature, the required extrusion force decreases, while the influence of the extrusion speed is opposite. The greater the extrusion speed, the greater the required extrusion force. The friction factor and the maximum shear stress are both positively correlated with the extrusion force.

基金项目：

国家重点研发计划（2024YFF0618901）

作者简介：车洪艳（1977-），女，博士，正高级工程师 E-mail：chehy.2009@tsinghua.org.cn

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