Thick-wire single-power-source shallow-fusion-depth high-efficiency submerged-arc automatic surfacing process method

Abstract

The invention discloses a thick-wire single-power-source shallow-fusion-depth high-efficiency submerged-arc automatic surfacing process method. The method comprises the following steps that a weldingwire is used for winding six fine welding wires around one center welding wire to be spiraled into a spiral structure; and the prepared welding wire is fed into a welding area of a submerged-arc automatic trolley through a wire guide pipe and is connected with a welding power source to transmit welding current, the submerged-arc automatic trolley can move along the joint of a base material, meanwhile, a flux is applied to the welding area in an assisted mode until surfacing is completed. According to the method, the rotation motion of the welding arc is further driven under the action of mechanical rotation generated during feeding of the spiral-shaped single wires, a liquid molten pool is forced to carry out fluid motion perpendicular to the fusion depth direction so as to reduce the convection motion of the metal in the molten pool to the bottom, so that the heat inside the molten pool is conducted in the width direction of a weld joint, then the melting amount of the root of the molten pool is reduced, and a welding bead is enabled to be expanded in the width direction. According to the process method, the cable type welding wire shallow fusion depth with the diameter of 6.0 mmand wide-bead submerged-arc automatic surfacing are achieved, extremely high surfacing efficiency is realized, meanwhile, the welding cost can be further reduced.

Description

technical field [0001] The invention belongs to the field of submerged arc surfacing welding, in particular to an automatic submerged arc surfacing welding process with thick wire single power source, shallow penetration depth and high efficiency. Background technique [0002] Surface modification methods such as thermal spraying, physical vapor deposition, and chemical vapor deposition have the best bonding strength due to the metallurgical bonding between the surfacing layer and the base material, and are widely used in pressure vessels in the industrial field. Manufacturing, shipbuilding and protection, and oil pipeline protection, etc. As an economical and convenient process for material surface modification, surfacing welding is especially suitable for large-area surface modification and repair of parts. In order to play the role of the surfacing layer most effectively, it is hoped that the surfacing welding method adopted has a small dilution effect of the base metal ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of large penetration depth and narrow fusion width of single wire submerged arc welding in the prior art, and to provide a thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing process, which can use ordinary submerged arc welding Arc welding uses a single power source for surfacing welding to achieve shallow penetration and wide bead welding effects, and can well meet the requirements of weld bead forming

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