(Ti, Al) N reinforced self-shielded flux-cored wire utilizing air N infiltration

A technology of flux-cored welding wire and self-protection, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of high price and increased welding wire manufacturing cost, so as to reduce welding wire cost, save welding wire cost, increase Effect of Strength and Abrasion Resistance

CN109664046AActive Publication Date: 2019-04-23JIANGSU UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-04-23

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Abstract

The invention discloses a (Ti, Al) N reinforced self-shielded flux-cored wire utilizing air N infiltration. According to the (Ti, Al) N reinforced self-shielded flux-cored wire utilizing air infiltration, a low-carbon steel strip is taken as an outer skin, and a flux core comprises, by mass percentage, 36-55% of micro-carbon ferrochrome, 10-25% of a mechanical mixture of ferrotitanium and aluminumpowder, 10-20% of rutile, 2-6% of marble, 3-8% of lithium fluoride, 1-3% of micro-carbon ferromanganese, 1-3% of potassium fluosilicate, 0.5-1% of sodium alginate and the balance iron powder, whereinferrotitanium: aluminum powder is larger than or equal to 3:2 and smaller than or equal to 4:1, and the flux core powder accounts for 25-30% of the total weight of the welding wire. According to theself-shielded flux-cored wire, no additional shielding gas is required, a certain nitrogen partial pressure is maintained in a welding atmosphere, N in air is used as a raw material, part of N is infiltrated into deposited metal, and a (Ti, Al) N strengthening phase is generated by a reaction with Ti and Al, so that the strength and wear resistance of the wire are increased, and meanwhile the costof the wire is greatly reduced.
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Description

technical field

[0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a Cr12N steel self-shielding flux-cored welding wire. 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 the manufacturing method thereof) all increase ...

Examples

Embodiment 1

[0024] A (Ti,Al)N reinforced self-shielding flux-cored welding wire infiltrated by air, 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. Among them, ferrotitanium: al...

Embodiment 2

[0026] A (Ti,Al)N reinforced self-shielding flux-cored welding wire infiltrated by air, 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. Among them, ferrotitanium: alumin...

Embodiment 3

[0028]A (Ti,Al)N reinforced self-shielding flux-cored welding wire infiltrated by air, 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. Among them, ferrotitanium...