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A basic flux-cored wire for all-position welding

A flux-cored welding wire and all-position technology, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of pores in the weld metal, increase the melting point of slag, and the melting and falling of the weld bead. Good seam formation, small spatter and stable arc

Active Publication Date: 2018-05-01
ZHENGZHOU HUAWEI WELDING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the basic flux cored wire is welded in all positions, it is easy to cause the weld bead to melt and drop, so it is only suitable for flat welding position welding
[0009] The fluoride often added in flux cored wire is CaF 2 , CaF 2 In the flux-cored wire, it has the function of reducing the melting point of the powder, has the effect of thinning slag, and can improve the protective effect of slag, but for all-position welding of welding wire, CaF 2 It is easy to cause the welding bead to melt and drop
In addition, in the basic flux-cored welding wire, the slagging agent often added is MgO, which can reduce the surface tension of slag, refine the molten droplets, and reduce spatter. However, MgO is a high-melting point oxide, and excessive slag will increase Melting point, it is easy to cause defects such as pores in the weld metal

Method used

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  • A basic flux-cored wire for all-position welding
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  • A basic flux-cored wire for all-position welding

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The present invention can be used for basic flux-cored welding wire for all-position welding. The flux-cored welding wire is composed of a low-carbon cold-rolled steel strip and a flux core. In terms of mass percentage: 70% of the low-carbon cold-rolled steel strip and 30% of the flux core. Firstly, select the SPCC low-carbon cold-rolled steel strip with a width of 14mm and a thickness of 0.5mm, press it into a U shape through a forming machine, then fill the drug core into the U-shaped groove, and then close the opening of the U-shaped groove to form an O shape. In this way, the flux core is wrapped in it, and the wire drawing machine is drawn one by one, and the diameter is reduced to form a Ф1.6mm all-position welding alkaline flux cored wire;

[0033] The drug core is calculated by weight percentage: 30% fluorite, 10% zircon sand, 3.5% barium fluoride, 4% barium carbonate, 9% calcium oxide, 2% potassium fluorosilicate, 45# ferrosilicon 7%, metal manganese 6%, nickel...

Embodiment 2

[0035] The present invention can be used for basic flux-cored welding wire for all-position welding. The flux-cored welding wire is composed of a low-carbon cold-rolled steel strip and a flux core. In terms of mass percentage: 72% of the low-carbon cold-rolled steel strip and 28% of the flux core. First, select SPCC low-carbon cold-rolled steel strip with a width of 12mm and a thickness of 0.6mm, and press it into a U shape through a forming machine; then fill the drug core into the U-shaped groove, and then close the opening of the U-shaped groove to form an O shape. In this way, the flux core is wrapped in it, and the wire drawing machine is drawn one by one, and the diameter is reduced to form a Ф1.6mm all-position welding alkaline flux cored wire;

[0036] The drug core is calculated by weight percentage: 33% fluorite, 5% zircon sand, 4.5% barium fluoride, 2% barium carbonate, 7% calcium oxide, 4.5% potassium fluorosilicate, 45# ferrosilicon 4%, metal manganese 4%, nickel ...

Embodiment 3

[0038] The present invention can be used for basic flux-cored welding wire for all-position welding. The flux-cored welding wire is composed of a low-carbon cold-rolled steel strip and a flux core. In terms of mass percentage: 72% of the low-carbon cold-rolled steel strip and 28% of the flux core. First, select SPCC low-carbon cold-rolled steel strip with a width of 10mm and a thickness of 0.8mm, and press it into a U shape through a forming machine; then fill the drug core into the U-shaped groove, and then close the opening of the U-shaped groove to form an O shape. In this way, the flux core is wrapped in it, and the wire drawing machine is drawn one by one, and the diameter is reduced to form a Ф1.6mm all-position welding alkaline flux cored wire;

[0039] The drug core is calculated by weight percentage: 35% fluorite, 10% zircon sand, 9% barium fluoride, 5% barium carbonate, 6% calcium oxide, 3% potassium fluorosilicate, 45# ferrosilicon 3%, metal manganese 8%, nickel pow...

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Abstract

The invention relates to an all-position welding basic flux-cored wire, and aims to provide a basic flux-cored wire which can be effectively used for all-position welding and has high toughness and slag detachability. The wire is manufactured by wrapping a flux core with a cold-rolled low-carbon steel strip, wherein the content of the cold-rolled low-carbon steel strip is 68 to 74 mass percent, and the mass of the flux core is 26 to 32 mass percent; the flux core is prepared by uniformly mixing fluorite, zircon sand, barium fluoride, barium carbonate, calcium oxide, potassium fluosilicate, 45# ferrosilicon, manganese metal, nickel powder and reduced iron powder FHY100.25 special for a welding material. A method is simple, the raw materials are rich, the cost is low, and the weld metal of the wire has high cracking resistance and low-temperature impact toughness, and particularly has all-position welding performance; the wire is high in welding process performance and weld formation performance, stable in arc and slight in splashing, and slag can be automatically detached during flat welding.

Description

technical field [0001] The invention relates to a welding wire, in particular to a basic flux-cored welding wire for all-position welding. Background technique [0002] Welding wire is indispensable in the welding process. According to the position between the electrode held by the welder and the weldment during welding, the weld can be divided into four directions: flat welding, vertical welding, horizontal welding and overhead welding, among which: [0003] (1) The welding position of flat welding seam inclination angle 0°~5° and weld seam rotation angle 0°~10° is called flat welding position. Welding performed in the flat welding position is called flat welding. Flat welding is the easiest position to weld. [0004] (2) The welding position of the vertical welding seam inclination angle of 80°~90° and the welding seam rotation angle of 0°~180° is called the vertical welding position. Welding performed in the vertical welding position is called vertical welding. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/368B23K35/38B23K35/40
CPCB23K35/368B23K35/38B23K35/40
Inventor 冯纪东李国立王文锋郭海勇余陪李家骧
Owner ZHENGZHOU HUAWEI WELDING IND CO LTD