Metal powder core welding wire for high-strength steel Ar-CO2 gas shielded welding

A gas shielded welding, metal powder core technology, applied in metal processing equipment, welding medium, welding equipment, etc., can solve the problems of poor low temperature impact toughness, low yield strength, unreachable welding metal yield strength, etc., and achieve low temperature impact toughness. Good, good low temperature impact toughness and high strength of weld metal

Inactive Publication Date: 2019-09-20
新乡市和光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is currently used in high-strength steel Ar-CO 2 The metal welded by metal powder cored wire for gas shielded welding has low yield strength and poor low temperature impact toughness
For example: patent CN1840728A discloses a low-alloy steel welding metal and a powder-cored wire used to provide the welding metal, which gives a weld metal yield strength between 440 and 680 MPa; patent CN101323057A discloses a welding metal with a yield strength exceeding 785MPa seamless flux-cored welding wire for low alloy steel welding, the yield strength of the weld metal given by it cannot reach 900MPa

Method used

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  • Metal powder core welding wire for high-strength steel Ar-CO2 gas shielded welding

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The high-strength steel Ar-CO of the present invention 2 Metal powder cored wire for gas shielded welding, including steel sheath and powder core, the manufacturing steps are as follows:

[0028] 1. Powder core powder preparation:

[0029] Prepare powder core powder and mix uniformly according to the content of the following elements relative to the total mass percentage of the welding wire:

[0030] C: 0.02%, Si: 0.2%, Mn: 1.0%, Ni: 1.0%, B: 0.001%, Cr: 0.1%, Al: 0.01%, Mo: 0.3%, Mg: 0.01%, Zr: 0.02%, W: 0.5%, rare earth element Ce: 0.10%.

[0031] Among them, carbon uses graphite, silicon uses ferrosilicon, manganese uses ferromanganese, nickel uses metal nickel powder, boron uses boron iron, chromium uses metal chromium powder, aluminum uses aluminum powder, molybdenum uses metal molybdenum powder, magnesium uses metal magnesium powder, Zirconium iron is used for zirconium, tungsten iron is used for tungsten, and cerium ferrosilicon is used for Ce.

[0032] 2. Pr...

Embodiment 2

[0038] 1. Powder core powder preparation:

[0039] Prepare powder core powder according to the content of the following elements relative to the total mass percentage of the welding wire:

[0040] C: 0.12%, Si: 0.7%; Mn: 3.0%, Ni: 3.5%, B: 0.013%; Cr: 0.7%, Al: 0.03%, Mo: 0.6%, Mg: 0.10%, Zr: 0.02~0.06 %, W: 1.0%, rare earth element La: 0.5%.

[0041] Among them, graphite is used for carbon, ferrosilicon powder is used for silicon, metal manganese powder is used for manganese, metal nickel powder is used for nickel, ferroboron is used for boron, metal chromium powder is used for chromium, aluminum powder is used for aluminum, molybdenum metal powder is used for molybdenum, and magnesium metal is used for magnesium. Powder, zirconium iron zirconium powder, tungsten iron tungsten, La iron lanthanum silicon.

[0042] In addition, the arc stabilizer Na is added to the above powder 2 O, the content is 0.5% of the total mass percentage of the welding wire, mixed evenly.

[0043]...

Embodiment 3

[0048] 1. Powder core powder preparation:

[0049] Prepare powder core powder and mix uniformly according to the content of the following elements relative to the total mass percentage of the welding wire:

[0050] C: 0.12%, Si: 0.3%, Mn: 2.0%, Ni: 3.0%, B: 0.015%, Cr: 0.5%, Al: 0.05%, Mo: 0.4%, Mg: 0.4%, Zr: 0.06%, W: 1.5%, Y: 0.50%.

[0051] Among them, carbon uses graphite, silicon uses ferrosilicon, manganese uses ferromanganese, nickel uses metal nickel powder, boron uses boron iron, chromium uses metal chromium powder, aluminum uses aluminum powder, molybdenum uses metal molybdenum powder, magnesium uses metal magnesium powder, Zirconium iron is used for zirconium, tungsten iron is used for tungsten, and yttrium iron is used for rare earth element Y.

[0052] In addition, arc stabilizer K is added to the above powder 2 O, the content is 0.4% of the total mass percentage of the welding wire, mixed evenly.

[0053] 2. Production of welding wire

[0054] Using the powd...

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Abstract

The invention discloses a metal powder core welding wire for high-strength steel Ar-CO2 gas shielded welding. The metal powder core welding wire for the high-strength steel Ar-CO2 gas shielded welding comprises a steel coating and a powder core, wherein the powder core comprises the following elements in percentage by mass relative to the percentage of total mass of the welding wire: 0.02-0.12% of C, 0.2-0.7% of Si, 1.0-3.0% of Mn, 1.0-3.5%of Ni, 0.001-0.015% of B, 0.1-0.7% of Cr, not greater than 0.05% of Al, 0.3-0.6% of Mo, 0.01-0.4% of Mg, 0.02-0.06% of Zr, 0.5-1.5% of W, and 0.10-1.00% of rare earth element. According to the metal powder core welding wire for the high-strength steel Ar-CO2 gas shielded welding, all components synergistically act, so that the low-temperature impact toughness of weld joint metal is high; the tensile strength and the extension strength of deposited metal are beyond 1000MPa; and high-strength steel can be welded.

Description

technical field [0001] The present invention relates to a kind of Ar-CO 2 Metal powder-cored welding wire for gas-shielded welding, especially a kind of high-strength steel Ar-CO 2 Metal powder cored wire for gas shielded welding. Background technique [0002] High-strength steel is more and more widely used in engineering, especially in the fields of offshore engineering platforms and large construction machinery vehicles. Compared with welding materials such as electrodes and solid wires commonly used at present, metal powder cored wire has the advantages of high deposition efficiency, no slag cleaning for multi-layer multi-pass welding, and high work efficiency. Ar-CO 2 Mixed gas shielded welding compared to pure CO 2 Gas-shielded welding has finer droplets, better weld shape, and basically no spatter in the welding process. However, it is currently used in high-strength steel Ar-CO 2 The metal welded by metal powder cored wire for gas shielded welding has low yield...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/22
CPCB23K35/0266B23K35/22
Inventor 张晓郝毓涛尹玉环赵慧慧
Owner 新乡市和光科技有限公司
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