A kind of (ti, al)n strengthened self-shielding flux-cored welding wire with air infiltration

A technology of flux-cored welding wire and self-protection, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of high price and increase the manufacturing cost of welding wire, so as to reduce the cost of welding wire, save the cost of welding wire, and reduce the cost of welding wire. Good slag effect

Active Publication Date: 2021-04-09
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nitrides such as chromium nitride are expensive and increase the cost of welding wire manufacturing

Method used

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  • A kind of (ti, al)n strengthened self-shielding flux-cored welding wire with air infiltration
  • A kind of (ti, al)n strengthened self-shielding flux-cored welding wire with air infiltration
  • A kind of (ti, al)n strengthened self-shielding flux-cored welding wire with air infiltration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A (Ti, Al)N reinforced self-shielding flux-cored welding wire utilizing air infiltration of N, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the flux core is prepared according to the following quality: including low-carbon steel Belt and drug core, the drug core is filled in the steel belt, and the components of the drug core are prepared according to the following quality: including low carbon steel belt and drug core, and the drug core is filled in the steel belt. The composition of steel strip H08A is C: 0.1%, Mn: 0.3-0.55%, Si: 0.3%, S: ≤0.03%, P: ≤0.03%. The drug core composition is prepared according to the following quality: 36g of microcarbon ferrochromium, 25g of mechanical mixture of titanium iron and aluminum powder, 15g of rutile, 6g of marble, 8g of lithium fluoride, 1g of microcarbon ferromanganese, 1g of Potassium fluorosilicate, 1g of sodium alginate, 7g of iron powder. Wherein, f...

Embodiment 2

[0026] A (Ti, Al)N reinforced self-shielding flux-cored welding wire utilizing air infiltration of N, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the flux core is prepared according to the following quality: including low-carbon steel Belt and drug core, the drug core is filled in the steel belt, and the components of the drug core are prepared according to the following quality: including low carbon steel belt and drug core, and the drug core is filled in the steel belt. The composition of steel strip H08A is C: 0.1%, Mn: 0.3-0.55%, Si: 0.3%, S: ≤0.03%, P: ≤0.03%. The drug core composition is prepared according to the following quality: 55g of micro-carbon ferrochrome, 10g of mechanical mixture of titanium and aluminum powder, 10g of rutile, 2g of marble, 3g of lithium fluoride, 3g of micro-carbon ferromanganese, 3g of Potassium fluorosilicate, 1g of sodium alginate, 13g of iron powder. Wherein, ferro...

Embodiment 3

[0028]A (Ti, Al)N reinforced self-shielding flux-cored welding wire utilizing air infiltration of N, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the flux core is prepared according to the following quality: including low-carbon steel Belt and drug core, the drug core is filled in the steel belt, and the components of the drug core are prepared according to the following quality: including low carbon steel belt and drug core, and the drug core is filled in the steel belt. The composition of steel strip H08A is C: 0.1%, Mn: 0.3-0.55%, Si: 0.3%, S: ≤0.03%, P: ≤0.03%. The drug core composition is prepared according to the following quality: 40g of microcarbon ferrochromium, 15g of mechanical mixture of titanium iron and aluminum powder, 20g of rutile, 4g of marble, 5g of lithium fluoride, 2g of microcarbon ferromanganese, 2g of Potassium fluorosilicate, 0.5g of sodium alginate, 11.5g of iron powder. Wherei...

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Abstract

The invention discloses a (Ti, Al)N reinforced self-protecting flux-cored welding wire infiltrated with air. The low-carbon steel strip is used as the outer skin, and the composition of the flux core is: 36-55% micro-carbon ferrochrome, 10% by mass. ~25% mechanical mixture of ferrotitanium and aluminum powder, 10~20% rutile, 2~6% marble, 3~8% lithium fluoride, 1~3% micro-carbon ferromanganese, 1~3% Potassium fluorosilicate, 0.5-1% sodium alginate, and iron powder as the balance, wherein, 3:2≤ferro-titanium:aluminum powder≤4:1. Flux core powder accounts for 25‑30% of the total wire weight. The self-shielding flux-cored welding wire provided by the invention does not require additional shielding gas, maintains a certain partial pressure of nitrogen in the welding atmosphere, uses N in the air as a raw material, partially infiltrates N into the deposited metal, and reacts with Ti and Al to form (Ti ,Al)N strengthening phase, increase the strength and wear resistance of welding wire, and greatly reduce the cost of welding wire.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a (Ti, Al)N reinforced self-protecting flux-cored welding wire which utilizes air to infiltrate N. Background technique [0002] For a long time, chromium carbide (Cr 7 C 3 , Cr 23 C 6 , Cr 3 C and other carbides) to strengthen the flux-cored wire and increase the hardness of the deposited metal is a common choice for welding material researchers. In recent years, studies have found that nitrides have higher hardness and stability than carbides, and have the potential to provide better wear resistance. Patent document 2 (CN1562552A, a nitrogen-alloyed hardfacing alloy flux-cored welding wire material), patent document 3 (CN101829861A, high crack resistance and wear-resistant submerged arc surfacing flux-cored welding wire) and patent document 4 (CN102019520A, used for The welding wire for repairing the worn part of the grinding part and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/0266B23K35/3053B23K35/406
Inventor 刘大双魏萍
Owner JIANGSU UNIV OF SCI & TECH
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