Submerged-arc welding process of stainless steel composite steel plate

The invention discloses a submerged-arc welding process of a stainless steel composite steel plate, which has the advantages that the labour intensity of welders can be effectively reduced, the labour condition, production efficiency and the welding quality are improved, the production cost is reduced, and the like. The invention comprises the following processes of: (1) processing a groove, i.e., processing the welding end of the stainless steel composite steel plate to be welded into a groove; (2) using the weld bead in the middle part of the groove as a bottoming weld line, using the weld bead at the upper part of the base layer bottoming weld line close to the stainless steel composite steel plate composite layer as the multicoat weld line and using the weld bead at the lower part of the base layer bottoming weld line as the base layer filling cap weld; (3) welding the base layer bottoming weld line by a traditional process; (4) welding the base layer filling cap weld by a traditional process; and (5) welding the multicoat weld line, wherein the welding current ranges from 350A to 400A, the welding voltage ranges from 28V to 30V and the welding speed ranges from 40cm/min to 50cm/min.