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金属容器在焊接或修补时,由于受热不均匀所造成的焊接应力,我厂曾采用过多种焊后处理方法,但都不理想。有的产生裂纹;有的费用较高。现我们采用局部低温加热的方法消除焊后应力,取得了较好效果。操作方法如下(见图): 在焊缝两侧各宽约150mm范围内用气体烧嘴加热,使焊缝及其附近产生如图示的温度分布曲线(加热时要注意加热部位的物理状态。例如焊45钢容器,就
Metal containers in the welding or repair, due to uneven heating caused by the welding stress, I have used a variety of welding plant after treatment, but not ideal. Some produce cracks; some cost more. Now we use the local method of low temperature heating to eliminate post-weld stress, and achieved good results. The operation method is as follows (see picture): Heat the gas burner with the gas burner within the width of 150mm on both sides of the weld seam to make the temperature distribution curve as shown in the figure. (Note the physical state of the heating part when heating. For example, welding 45 steel containers, on