Transactions of Materials and Heat Treatment

Title：Numerical simulation of aluminum alloy square tube gradient temperature optimization and metal rheology of isothermal extrusion process

Authors： Xu Yongli Wang Yuwen Pang Zugao Huang Shangmeng Yang Zhigao

Unit： Guangxi College of Water Resources and Electric Power Guangxi University Guangxi Technological College of Machinery and Electricity

KeyWords： isothermal extrusion metal rheology numerical simulation orthogonal experiment

ClassificationCode：TG376

year,vol(issue):pagenumber：2014,39(11):33-38

Abstract：

Based on HyperXtrude transient analysis, 120 ℃ optimal gradient temperature obtained by four factors and four levels orthogonal experiment for the aluminum alloy square tube was simulated. The results show that at the die exit there maintains a temperature difference of 5 ℃ under isothermal extrusion condition when extrusion plastic heating temperature difference balances with the reduced temperature of billet. The mean-square deviation of profile exit velocity reduces from 3.263 mm·s-1 to 0.362 mm·s-1, and the deformation of profile reduces from 1.690 mm to 0.054 mm. The temperature distribution of axial section presents a stepped shape in deformation zone of the billet. The temperature, velocity and deformation degree of the deformation zone get more uniform when it is closer to the die exit.

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）

徐永礼 (1956-)，男，学士，副教授

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