Porosity in the weld seam during submerged arc welding of stainless steel
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What causes pores to appear on the weld during stainless steel submerged arc welding? These pores disappear after grinding them away with a grinder by 1–2 mm, and the weld shape is good. What is the reason for this?
What causes pores to appear on the weld during submerged arc welding of stainless steel? It’s likely that the flux has become damp, or it wasn’t dried before use
1. Poor quality or moisture in the flux. 2. Impurities such as rust, oxide films, and oils in the weld. 3. Excessive amount of flux, which makes it difficult for gases to escape. 4. Oil contamination on the welding wire
In addition to the reasons analyzed above, the main factors include the type of welding groove and an excessively fast welding speed (welding parameters).
The material is SUS304, and the flux used is HJ260; the flux is dried at 380 degrees for 2 hours before welding
8mm 304 steel – the speed is acceptable. I’ve used this brand of welding flux from this manufacturer before, but problems arose this time
After reviewing the materials you’ve chosen, there don’t seem to be any major issues. It is recommended to use a Y-shaped groove; a current of 400A, a voltage of 30V, and a speed of 45 cm/min should work fine. If there are issues, an X-shaped groove can be used, and the process parameters need to be adjusted.