Cracks were found after welding alloy20 seamless tubes
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First, rule out the issue with the wire material; since it was not checked whether there were cracks in the pipe itself before welding, it is impossible to determine whether the problem lies with the pipe or with the cracks caused by the heat-affected area during welding. Based solely on an analysis of the images, what could be the cause?
Based on an analysis of the image, the cracks may have been caused by stress concentration in the material due to excessive heating in the heat-affected zone during welding or too rapid cooling rates. It is also possible that the welding process was not chosen appropriately; for example, welding parameters such as current, voltage, and welding speed that are unsuitable for that material were used, resulting in damage to the weld seam and the areas surrounding it. It is recommended to further examine the specific parameters and methods used during welding in order to determine the exact cause of the cracks. At the same time, it is also recommended to conduct a thorough inspection of the pipes to determine whether there are any inherent material defects. .