去应力退火对焊接结构件残余应力与力学性能的影响与分析

Influence and Analysis of Stress Relief Annealing for a Welded Structure on Residual Stress and Mechanical Properties

针对5A06铝合金圆筒形焊接结构件,对其去应力退火热处理,分别研究了去应力退火对其焊缝及焊缝附近表面横向残余应力、5A06铝合金抗拉强度和焊缝抗拉强度的影响。试验结果表明:120℃去应力退火和180℃去应力退火对焊缝及焊缝附近的表面横向残余应力和5A06铝合金抗拉强度有降低效果,但对焊缝的抗拉强度却基本没有影响。

In this paper, for the cylindrical welded structure of 5 A06 aluminium alloy, the stress relief annealing is used for heat treatment of the welded structure. The effects of stress relief annealing on surface transverse residual stress near the weld, the tensile strength of 5 A06 aluminium alloy and the tensile strength of the weld are studied. The experimental results indicate that when the annealing temperature is 120℃ and 180℃, the stress relief annealing not only reduces the surface transverse residual stress near the weld, but also reduces the tensile strength of 5 A06 aluminium alloy. But the stress relief annealing has little effect on the tensile strength of the weld.