基于HyperXtrude的ZK60镁合金型材挤压成形数值模拟和实验验证  

Numerical simulation and experimental verification of ZK60 magnesium alloys profile extrusion based on Hyper Xtrude

作　　者：郭丽丽[1] 李永兵[2] 裴久杨[1] 

机构地区：[1]大连交通大学连续挤压工程研究中心,辽宁大连116021 [2]机械科学研究总院先进制造技术研究中心,北京100083

出　　处：《锻压技术》2015年第6期138-144,共7页Forging & Stamping Technology

基　　金：国家自然科学基金青年科学基金资助项目(51401043)

摘　　要：应用Hyper Xtrude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Hyper Xtrude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 reasona- bly. It is demonstrated that the metal flow and weld position of magnesium alloys during extrusion process can be predicted by HyperXtrude.

关 键 词：ZK60镁合金型材 挤压成形 有限元模拟 金属流动 焊合 

分 类 号：TG379[金属学及工艺—金属压力加工]