Transactions of Materials and Heat Treatment

Title：Numerical simulation of variable speed extrusion for isothermal extrusion process of aluminum alloy square tube based on Deform-3D

Authors： Yang Zhigao1 Xu Yongli2 Pang Zugao1 Huang Shangmeng3 Ban Mibian1

Unit： 1.Guangxi University 2.Guangxi College of Water Resources and Electric Power 3.Guangxi Technological

KeyWords： aluminum alloy profile Deform-3D isothermal extrusion numerical simulation

ClassificationCode：

year,vol(issue):pagenumber：2015,40(4):152-157

Abstract：

ased on Deform-3D finite element analysis, the variable speed extrusion model of aluminum alloy square tube was built and the extrusion process was simulated numerically. The results show that the higher the extrusion speed is, the higher the temperature in the mold exitis, and the bigger the temperature difference is. The isothermal extrusion with constant temperature difference of 8 ℃ in the mold exit can be realized effectively by segmented variable speed extrusion with velocities of 7，5，3 mm·s-1. The maximum effective stress is 47.4 MPa,the maximum effective strain is 7.92, and the maximum damage is 1.70 under isothermal extrusion condition, which are reduced by 10%, 23.8% and 48.5% respectively compared to the corresponding values obtained by the constant speed extrusion model with velocity of 5 mm·s-1. The good surface quality, the tiny and uniform metallographic structure and the high mechanical properties of aluminum alloy square tube are obtained.

Funds：

广西自然科学基金资助项目（2013GXNSFAA019303)；广西有色金属及特色材料加工重点实验室开放课题基金项目（GXKFJ12-04）

杨志高(1988-），男，硕士研究生

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