Method for welding stainless steel pipe groove without argon filling

Abstract

The present application relates to the technical field of welding, especially to a stainless steel pipeline groove argon-free welding method. The method comprises the following steps: preparing a single V-shaped groove for two pieces of stainless steel pipelines to be welded; aligning the grooves of the two pieces of stainless steel pipelines to be welded, selecting four welding points, and controlling the gap at the welding points; using a stainless steel self-preservation welding wire to perform edge welding on the grooves of the four welding points, adopting a droplet method to perform surfacing welding, cross-welding from both sides of the groove until the grooves on both sides are connected by the surfacing welding seams to form a bridging connection; performing root groove backing welding of the pipeline, and when the backing welding reaches the bridging welding seam position, grinding the bridging welding seam and then continuing to perform the root groove backing welding of the pipeline until the root groove welding is completed. The present application not only meets the welding requirement of the stainless steel pipeline using the argon-free process, but also reduces the welding and non-destructive testing workload, improves the welding efficiency, and avoids the risk of damaging the base material by using the traditional groove assembly method.

Images