锻压技术

AZ31镁合金型材ECAP复合挤压工艺宏微观仿真研究

英文标题：Macro-micro coupled numeral study on AZ31 magnesium alloy profile made by ECAP complex extrusion process

作者：马俊

单位：苏州工业职业技术学院

分类号：TG376.9

出版年,卷(期):页码：2014,39(8):115-118

摘要：

基于Deform-3D有限元平台，建立了某规格AZ31镁合金型材ECAP复合挤压工艺（等通道挤压ECAP和正挤压耦合工艺）过程的宏微观耦合有限元模型。研究发现：型材突破模具出口后挤压力稳定在16000 kN左右；突破工作带的型材温度在449~473 ℃范围内波动；型材平均晶粒尺寸可细化到约6~6.5 μm。试验结果和模拟结果吻合良好，验证了所建立有限元模型在宏观和微观规律预测时的稳定性和可靠性。该有限元模型和研究结果可为ECAP复合挤压工艺参数的合理取值、组织性能的有效控制提供理论依据。

Based on Deform-3D finite element platform, a macro-micro coupled finite element model for ECAP complex extrusion process (ECAP coupled with forward extrusion process) of a specification AZ31 magnesium alloy profile was established. The results show that the extrusion-load is stable at around 16000 kN and the temperature is in the range of 449-473 ℃ when the profile makes a breakthrough on the die exit. Extruded profiles can be refined to an average grain size of about 6-6.5 μm. These results are in good agreement with experimental results. So, the stability and reliability of the FE model to predict the macro and micro regularity are verified clearly. The FE model and results can provide theoretical basis for the selection of process parameters and control of organization and performance of ECAP complex extrusion process of AZ31 magnesium alloy profile.

基金项目：

省级示范性高职院校建设项目（苏教高（2011）23号）；院级科研课题（SGKB201406）

马俊（1973-），男，硕士，副教授

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