A thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing welding process method

Abstract

The invention discloses a thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing welding process. The welding wire used is to wrap 6 thin welding wires around a central welding wire knob to form a spiral structure, and the prepared welding wire is sent into the welding wire through the wire guide tube. The welding area of ​​the submerged arc automatic trolley is connected to the welding power supply to transmit the welding current, so that the submerged arc automatic trolley moves along the joint of the base metal, and at the same time assists flux to the welding area until the surfacing is completed. The invention utilizes the mechanical rotation effect generated when each helical monofilament is fed to drive the welding arc to rotate, forcing the liquid molten pool to move perpendicular to the penetration depth direction to weaken the convective movement of the molten pool metal to the bottom, thereby reducing the molten metal to the bottom. The heat inside the pool is conducted across the width of the weld, reducing the amount of melting at the root of the pool and expanding the bead across its width. The process method realizes the shallow penetration of the cable-type welding wire with a diameter of 6.0mm, and the automatic surfacing welding of the wide bead submerged arc, and has a very high surfacing efficiency, and can also reduce the welding cost.

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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