Thought question 11: What are the reasons why submerged arc welding is not often chosen for stainless steel equipment?
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Thought question 11: What are the reasons why submerged arc welding is not often chosen for stainless steel equipment?
Excessively high welding parameters (high current, high voltage) can lead to coarse grains in the weld and heat-affected zone, resulting in reduced corrosion resistance
Submerged arc welding involves high energy input, which results in significant welding deformation. Stainless steel equipment is generally thin, and welding of thin stainless steel sheets causes even greater deformation; therefore, submerged arc welding is rarely used for thin stainless steel containers
As long as welding is carried out using a qualified welding process, there are no problems; submerged arc welding has many advantages.
In comparison, the current used in submerged arc welding is too high, which can easily cause damage to the intergranular structure of stainless steel
It can easily lead to coarse grains in the weld and heat-affected zone, resulting in a reduced corrosion resistance
From a manufacturing perspective, when using submerged arc welding to weld stainless steel, the pass rate for inspections is low, and defects such as cracks tend to occur.
The estimated current is too high; the defects are large
One issue is that the shape obtained through stainless steel submerged arc welding is not good-looking