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Alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas

A technology of gas shielding and welding wire, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems of low low-temperature impact toughness value of weld metal, fracture or damage of welding place, unclean purification of weld seam, etc. , achieve the effect of high and low temperature impact toughness, less welding fume and less welding spatter

Inactive Publication Date: 2014-01-08
NINGBO LONGXING WELDING CUTTING TECH STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in the low temperature impact toughness value of the weld metal due to the fact that the weld seam is prone to unclean purification, many non-metallic inclusions, high diffusible hydrogen content, and slow diffusion during the welding process.
[0003] Moreover, the existing basic flux-cored wire is difficult to apply to the welding of ≥700MPa high-strength high-toughness steel, because the weld after welding cannot achieve the same performance as ≥700MPa high-strength high-toughness steel, resulting in Fracture or damage at the weld

Method used

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  • Alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas
  • Alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas
  • Alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Select a steel strip with a nominal thickness of 0.80mm, cut the nominal width into a cold-rolled steel strip for flux-cored welding wire with a nominal width of 14mm, and roll it into a U-shaped groove by a forming machine. Take 100 parts of medicine core powder as an example: take 17 parts of rutile, 23 parts of silicon manganese, 35 parts of iron powder, 9 parts of nickel powder, 3 parts of aluminum magnesium, 3.5 parts of marble, 3.5 parts of fluorite, and 6 parts of ferrovanadium. Put all the raw materials into the mixer and mix for 45 minutes, then add them to the U-shaped channel steel belt, the filling rate is 17%; close the U-shaped channel so that the drug core powder is wrapped in it, and then draw and reduce the diameter through the wire drawing machine , finally making the diameter of the wire reach 1.2mm.

[0064] Sample experiment:

[0065] 1. Deposited metal specimen

[0066] For each test piece of deposited metal test, two test plates and one gasket s...

Embodiment 2

[0082] Select a steel strip with a nominal thickness of 0.80mm, cut the nominal width into a cold-rolled steel strip for flux-cored welding wire with a nominal width of 14mm, and roll it into a U-shaped groove by a forming machine. Take 100 parts of flux-cored wire as an example: take 13 parts of rutile, 30 parts of silicon manganese, 25 parts of iron powder, 8 parts of nickel powder, 6 parts of aluminum magnesium, 2 parts of marble, 2 parts of fluorite, and 14 parts of ferrovanadium. Put all the raw materials into the mixer and mix for 45 minutes, then add them into the U-shaped groove made by steel strip rolling, and the filling rate is 17%; close the U-shaped groove so that the drug core powder is wrapped in it, and then pull through the wire drawing machine Pulling out and reducing the diameter finally makes the diameter of the welding wire reach 1.2mm.

Embodiment 3

[0084] Select a steel strip with a nominal thickness of 0.80mm, cut the nominal width into a cold-rolled steel strip for flux-cored welding wire with a nominal width of 14mm, and roll it into a U-shaped groove by a forming machine. Take 100 parts of flux-cored wire as an example: take 24% rutile, 26 parts silico-manganese, 25 parts iron powder, 5 parts nickel powder, 5 parts aluminum-magnesium, 5 parts marble, 5 parts fluorite, and 5 parts ferrovanadium. Put all the raw materials into the mixer and mix for 45 minutes, then add them to the U-shaped channel steel belt, the filling rate is 17%; close the U-shaped channel so that the drug core powder is wrapped in it, and then draw and reduce the diameter through the wire drawing machine , finally making the diameter of the wire reach 1.2mm.

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Abstract

The invention provides an alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas. The alkaline welding flux cored wire comprises flux cored powder and a steel belt wrapping the flux cored powder. The alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas is characterized in that the flux cored powder of the flux cored wire is composed of, by weight, 10-25% of rutile, 15-35% of silicon manganese alloy, 25-40% of iron powder, 4-15% of nickel powder, 1-10% of aluminium magnesium alloy, 1-6% of marble, 1-6% of fluorite and 3-15% of ferrovanadium. The alkaline welding flux cored wire protected by CO2 gas or 80Ar + CO2 gas has the advantages that the flux cored wire can be applied to welding of high-strength and high-ductility steel which is of the level larger than or equal to 700Mpa and guaranteeing overall performance, welding joints are purified and clean in the welding process, nonmetallic inclusion is little, the content of diffusible hydrogen is low, and the low temperature impact toughness value of welding metal is high.

Description

technical field [0001] The invention relates to the technical field of metal welding materials, in particular to a CO 2 or 80Ar+C0 2 Gas (80%Ar+20%C0 2 ) to protect the basic flux cored wire. Background technique [0002] The traditional basic slag-based flux-cored wire can only be used for pure carbon dioxide welding to reduce or reduce the sulfur and phosphorus content as much as possible because the welding process does not remove sulfur and phosphorus cleanly. However, there are still deficiencies in the low-temperature impact toughness value of the weld metal due to the fact that the weld seam is prone to unclean purification, many non-metallic inclusions, high diffusible hydrogen content, and slow diffusion during the welding process. [0003] Moreover, the existing basic flux-cored wire is difficult to apply to the welding of ≥700MPa high-strength and high-toughness steel, because the weld after welding cannot achieve the same performance as that of ≥700MPa high-st...

Claims

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Application Information

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IPC IPC(8): B23K35/368
CPCB23K35/3026B23K35/3073B23K35/3608B23K35/368
Inventor 赵善军邬剑敏陈一
Owner NINGBO LONGXING WELDING CUTTING TECH STOCK
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