Welding method capable of reducing inclusion defects in medium-thickness plate weld joints

Abstract

The invention discloses a welding method capable of reducing inclusion defects in medium-thickness plate weld joints. The welding method comprises the steps that welding is conducted in a groove to form the weld joints, cleaning laser is synchronously started for cleaning after each weld joint is formed, and metal colors of the weld joints are exposed. For a V-shaped groove, continuous laser and MIG hybrid welding is adopted for welding in the first welding process to form the weld joints, laser cleaning is synchronously conducted after welding, and then the first welding process and cleaningare repeatedly conducted. For a Y-shaped opening, the first welding process adopts continuous laser for welding to form the weld joints, laser cleaning is synchronously carried out, and then a secondwelding process is carried out on the surface of the first weld joint, continuous laser and MIG hybrid welding is adopted for welding, laser cleaning is synchronously carried out after welding, and then the second welding process and cleaning are repeated. An oxidation film formed by each weld joint can be effectively cleaned, the welding efficiency can be effectively improved, and the welding quality is improved.

Description

technical field [0001] The invention relates to the technical field of weld seam welding of medium and thick plates, in particular to a welding method capable of reducing inclusion defects inside weld seams of medium and thick plates. Background technique [0002] With the development of national industry and the continuous advancement of science and technology, not only higher and more stringent requirements are put forward for the performance of welded components of the hull, but also higher and higher requirements for personnel, labor intensity and worker safety Require. [0003] At present, the welding of hull structural parts mainly includes submerged arc welding and manual MIG welding. [0004] For submerged arc welding: The continuous increase of personnel costs directly leads to the continuous increase of shipbuilding costs. At the same time, submerged arc welding with large heat input makes structural parts prone to large welding deformation, and subsequent shaping...

AI Technical Summary

Problems solved by technology

It not only affects the welding progress, but also greatly increases the labor intensity of the workers and increases the welding cost of the enterprise

However, if no treatment is performed, during the second welding, the oxide layer may not have time to float up in the liquid molten pool and stay inside the molten pool, resulting in defects such as slag inclusions inside the weld

This kind of defect is difficult to find directly from the surface after the weld is repaired, but it will seriously affect the quality of use of the hull, easily cause greater accidents, and at the same time restrict the overall service life of the hull

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