Welding method for stainless steel sheet

1, metal surface treatment

Completely cleaning the surface of the stainless steel sheet in the tightly bonded area is important for successful welding. Oils and vegetable oils can be removed with organic solvents, and other ways of removing environmental pollution can be used to brush stainless steel sheet or by grinding with sandpaper, leaving a shiny surface. The mild surface roughness of the wear-resistant material is acceptable and improves the adhesion of the welding material. The actual welding operation shall be carried out immediately after cleaning. If this is not possible, tinplating the components with soldering materials can be used to maintain them.

2, flux,

Must be applied to remove metal oxides from the surface of the stainless steel plate, according to the ammonium sulfate solution is also very suitable for, if in the whole process of tight connection after all residual residue has no harm advantage. But we must pay attention to some according to ammonium sulfate flux with sulfuric acid, in the welding of stainless steel plate containing molybdenum, should prevent the application of sulfuric acid welding aid, after welding will cause joint cleaning is not good. Although turpentine solder AIDS have little practical effect, they can be applied when the surface of the stainless steel sheet must be precoated. The potential corrosion flux can be completely removed before the manufacture of the joint. This is very effective if the stainless steel sheet member includes dents or blind spots.

3, heating

All traditional heating methods can be used for welding stainless steel sheet. Only the relativity of the heat transfer of low alloy steel plate is weak and their thermal expansion coefficient is high, so you must pay attention to ensure that all the closely connected areas are evenly over the welding temperature and not easy to overtemperature, otherwise it will produce deformation at the interface