浅析焊接应力的控制与消除方法

Control and Elimination of Welding Stress

在焊接操作的过程中,由于焊接加热的不均匀性,导致焊接结构的局部发生变形,而之后冷却的工件内部会有残余应力的残留。焊接残余应力,对工件的机械强度会造成不同的影响,如工件断裂、变形、尺度精度下降等,因此对焊接应力的控制与消除进行分析论述显得十分重要,针对此,本文展开了一系列论述,结合锤击消除焊接应力实验,最终实验结果显示:采用锤击法消除残余应力的过程中,锤击的时间最好控制在1min以内能有效消除焊接应力。

In the process of welding operation,due to the non-uniformity of welding heating,the local deformation of the welding structure will occur,and there will be residual stress in the cooled workpiece.Welding residual stress will have different effects on the mechanical strength of the workpiece,such as workpiece fracture,deformation,reduction of scale accuracy,etc.Therefore,it is very important to analyze and discuss the control and elimination of welding stress.For this purpose,this paper has launched a series of discussions,combined with the experiment of eliminating welding stress by hammering,The final experimental results show that in the process of eliminating residual stress by hammering,the hammering time should be controlled within 1min,which can effectively eliminate welding stress.