Numerical Simulation of Hot Extrusion Process of GH3625 Alloy Tubes

Ding Yutian; Gao Xin; Dou Zhengyi; Gao Yubi; Jia Zhi; Guo Tingbiao; Liu Dexue

doi:10.15980/j.tzzz.2016.11.001

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Numerical Simulation of Hot Extrusion Process of GH3625 Alloy Tubes
Vol. 36, Issue 11, Pages: 1121-1125(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.11.001

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[1]丁雨田,高鑫,豆正义,高钰璧,贾智,郭廷彪,刘德学.GH3625合金管材热挤压过程的数值模拟[J].特种铸造及有色合金,2016,36(11):1121-1125.

Ding Yutian, Gao Xin, Dou Zhengyi, et al. Numerical Simulation of Hot Extrusion Process of GH3625 Alloy Tubes. [J]. Special Casting & Nonferrous Alloys 36(11):1121-1125(2016)
[1]丁雨田,高鑫,豆正义,高钰璧,贾智,郭廷彪,刘德学.GH3625合金管材热挤压过程的数值模拟[J].特种铸造及有色合金,2016,36(11):1121-1125. DOI： 10.15980/j.tzzz.2016.11.001.

Ding Yutian, Gao Xin, Dou Zhengyi, et al. Numerical Simulation of Hot Extrusion Process of GH3625 Alloy Tubes. [J]. Special Casting & Nonferrous Alloys 36(11):1121-1125(2016) DOI： 10.15980/j.tzzz.2016.11.001.

摘要

利用ABAQUS软件对高温合金GH3625热挤压成形过程进行数值模拟分析

获得坯料在不同工艺参数下的温度场、应力场的分布及挤压力变化情况。结果表明

通过GH3625热压缩模拟的数据计算所得挤压力的大小与模拟结果数值上接近

为进一步的试验研究及管材加工奠定了基础。适宜的挤压参数:坯料预热温度为1 180

200℃、挤压速度为50mm/s、模具预热温度为400℃。此外

实际生产中应该避免模具预热至350℃

以防止坯料出现过烧现象。

Abstract

The hot extrusion process for superalloy GH3625 was simulated numerically using finite element method on the ABAQUS.Influences of different processing parameters on the extrusion process were analyzed to obtain charge of stress and temperature fields of billet and extrusion force.By using data obtained from hot compression simulation experiment

the results show that the simulated value of extrusion force is closed to the calculated value from the empirical formula.It is established foundation to further experimental research and tube processing.The desirable processing parameters are presented as follows:initial billet temperature of 1 180

200℃

extruding speed of 50mm/s and initial die temperature of 400℃.Morever

the preheating temperature of the die must be strictly controlled below 350℃to prevent overheating structure in practical production.