Single-arc double-wire swing surfacing process

Abstract

The invention discloses a single-arc double-wire swing surfacing process. The single-arc double-wire swing surfacing process is characterized by comprising the following steps that: a single-power direct-current welding machine is adopted; two independent insulated wire feeder columns are connected with a positive electrode and a negative electrode respectively; the included angle between two wires from wire feeders is 0-15 DEG; the two wire feeders are mounted on the same welding mechanical swinger; and the swinger does the swing movement during the welding process, the swing width is 10-50mm, the swing frequency is 16-60times / min, the surfacing current is 300-500A, the voltage is 26-36V, the welding speed is 120-200mm / min, and the Rockwell hardness HRC is more than 60. The single-arc double-wire swing surfacing process has the advantages as follows: 1, the single-power double-wire welding process is adopted, so that the depth of fusion is reduced, the dilution rate is greatly reduced and is less than 20% of that in the single-wire welding process, and the depth of fusion can be controlled to be less than 0.5mm; and 2, the swing surfacing process is used, so that the weld pool retention time is long, impurities and gases can be fully overflowed, metal in a surfacing layer is pure, the mechanical performance is improved, and the surfacing efficiency is improved by 2-3 times.

Description

technical field [0001] The invention relates to a surfacing welding process, in particular to a single-arc double-wire swinging surfacing welding process. Background technique [0002] In the modern surfacing market, there are many workpieces that require thin surfacing layers, such as surfacing welding of continuous casting rolls of continuous casting machines in steel mills, surfacing welding of composite wear-resistant steel plates, etc. These workpieces require the thickness of the surfacing layer to be below 5mm. It is even about 2mm, and the welding layer is required to achieve high performance. Due to the traditional single-wire surfacing welding, the penetration depth is large and the surfacing welding dilution rate is high. If you want to press one or two layers, you must reach the alloy composition. Performance requirements are more difficult or costly. Contents of the invention [0003] The purpose of the present invention is to provide a single arc double wire...

AI Technical Summary

Problems solved by technology

[0002] In the modern surfacing market, there are many workpieces that require thin surfacing layers, such as surfacing welding of continuous casting rolls of continuous casting machines in steel mills, surfacing welding of composite wear-resistant steel plates, etc. These workpieces require the thickness of the surfacing layer to be below 5mm. It is even about 2mm, and the welding layer is required to achieve high performance. Due to the traditional single-wire surfacing welding, the penetration depth is large and the surfacing welding dilution rate is high. If you want to press one or two layers, you must reach the alloy composition. Performance requirements are difficult or costly