6005A-T6铝合金搅拌摩擦焊温度场数值模拟

Numerical simulation of the temperature filed of friction stir welding for 6005A-T6 aluminum alloy

基于ANSYS有限元分析软件,对3 mm厚的6005A-T6铝合金搅拌摩擦焊温度场进行了模拟,对比焊接接头形貌以及焊接热循环模拟结果与实测结果,并研究焊接速度、下压量、搅拌头旋转速度等焊接参数对摩擦焊峰值温度的影响。结果表明,搅拌摩擦焊焊缝形貌模拟结果与实测结果较为吻合,搅拌摩擦焊接进入稳态后,焊缝峰值温度基本稳定在510℃～512℃,随着距焊缝中心的距离增加,峰值温度逐渐降低,二者基本呈线性关系;峰值温度几乎随着焊接速度升高直线下降,随着下压量和搅拌头旋转速度的增加而升高,其中下压量和搅拌头旋转速度对峰值温度影响较大,而焊接速度对其影响较小。

Based on the ANSYS finite element analysis software, the temperature field of friction stir welding for 3mm thickness6005A-T6 aluminum alloy is simulated. The simulated results of morphology and welding thermal cycle of welded joints are compared with the measured results,and the effect of welding parameters,like welding speed,plunge depth and rotational speed on the peak temperature of friction stir welding are studied in this paper. The results show that the simulated result of friction stir weld morphology is in good agreement with measured result,the peak temperature of weld is basically stable at 510 ℃～512 ℃ during the steady state of friction stir welding,as the distance from the weld central line increases,the peak temperature reduces gradually,and they basically have a linear relationship; The peak temperature almost declines linearly as the welding speed increases and increases as the plunge depth and rotational speed increase,and the plunge depth and rotational speed have a greater influence on the peak temperature than welding speed.