锻压技术

基于HyperXtrude的ZK60镁合金型材挤压成形数值模拟和实验验证

英文标题：Numerical simulation and experimental verification of ZK60 magnesium alloys profile extrusion based on HyperXtrude

作者：郭丽丽李永兵裴久杨

分类号：TG375

出版年,卷(期):页码：2015,40(6):138-144

摘要：

应用HyperXtrude软件对ZK60镁合金空心型材的挤压成形过程进行了有限元数值模拟研究，分别得到了型材在稳态挤压下的温度场、速度场、应变场和位移场，分析了金属流动情况、焊合室入口和出口处的压力。通过不同挤压速度下的稳态模拟分析，确定了合适的型材挤压速度为10 mm·s-1。在挤压温度为350 ℃和挤压速度为10 mm·s-1条件下进行实验验证，得到了形状外观均合格的产品。对比分析发现，模拟结果与实验结果的型材断面宏观组织形貌具有一致性，证明了应用HyperXtrude 软件可以有效预测镁合金型材成形过程中的金属流动和焊合情况。

The extrusion process of magnesium alloy ZK60 with hollow profiles was simulated numerically by HyperXtrude software. Its temperature, velocity, strain and displacement distributions under the condition of the steady-state were obtained and the metal flow as well as pressure at entrance and exit of the welding-room were investigated. The optimized extrusion speed of 10 mm·s-1 was determined by the simulation analysis of steady-state at different extrusion speeds. Further, verification experiments were carried out with extrusion temperature at 350 ℃ and velocity at 10 mm·s-1. As a result, the products with good appearance and qualified shape were obtained. By contrast, the simulation results of the stain distribution and macro morphology show a good agreement with the experimental results reasonably. It is demonstrated that the metal flow and weld position of magnesium alloys during extrusion process can be predicted by HyperXtrude.

基金项目：

国家自然科学基金青年科学基金资助项目（51401043）

郭丽丽（1974-），女，博士，副教授

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