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High-strength low-temperature-resisting flux-cored wire for pipeline steel

A flux-cored welding wire, high-strength technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of unsatisfactory strength and low temperature resistance, poor arc stability, unreasonable composition configuration, etc., to achieve Effects of reducing porosity and cracks, improving strength, and good deoxygenation and dehydrogenation ability

Inactive Publication Date: 2017-10-20
安徽飞弧焊业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The welding quality and welding efficiency are determined by the welding material and welding process. At present, X120 grade pipeline steel flux-cored welding wire still has unreasonable component configuration, its arc stability is poor, and its strength and low temperature resistance cannot meet X120 grade. Pipeline Steel Requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high-hardness wear-resistant flux-cored welding wire proposed by the present invention is composed of a flux core and a stainless steel sheath coated on the outside of the flux core. The flux core includes the following components in terms of mass fraction: C: 0.12%, Be: 0.4%, Si: 1.2%, Al: 0.4%, Mn: 1.2%, Ni: 0.6%, Cr: 12.5%, Cu: 0.5%, Ti: 0.25%, Sr: 0.06%, Mo: 0.5%, W: 0.3%, V: 0.15%, Nb: 0.1%, Zr: 0.01%, Nd: 0.18%, Sc: 0.04%, B: 0.006%, Ce: 0.15%, Eu: 0.15%, Y: 0.05%, the rest is Fe and not Avoid impurities.

Embodiment 2

[0019] A high-hardness and wear-resistant flux-cored welding wire proposed by the present invention is composed of a flux core and a stainless steel sheath coated on the outside of the flux core. The flux core includes the following components in terms of mass fraction: C: 0.28%, Be: 0.15%, Si: 1.8%, Al: 0.1%, Mn: 1.8%, Ni: 0.2%, Cr: 15%, Cu: 0.25%, Ti: 0.55%, Sr: 0.02%, Mo: 2%, W: 0.1%, V: 0.4%, Nb: 0.04%, Zr: 0.035%, Nd: 0.1%, Sc: 0.1%, B: 0.001%, Ce: 0.3%, Eu: 0.05%, Y: 0.15%, the rest is Fe and not Avoid impurities.

Embodiment 3

[0021] A high-hardness and wear-resistant flux-cored welding wire proposed by the present invention is composed of a flux core and a stainless steel sheath coated on the outside of the flux core. The flux core includes the following components in terms of mass fraction: C: 0.2%, Be: 0.23%, Si: 1.5%, Al: 0.25%, Mn: 1.5%, Ni: 0.41%, Cr: 13.8%, Cu: 0.38%, Ti: 0.4%, Sr: 0.04%, Mo: 1.3%, W: 0.22%, V: 0.28%, Nb: 0.07%, Zr: 0.022%, Nd: 0.15%, Sc: 0.07%, B: 0.004%, Ce: 0.22%, Eu: 0.1%, Y: 0.1%, the rest is Fe and not Avoid impurities.

[0022] Among them, the welding process parameters are: the welding voltage is 28V, the welding current is 290A, the wire feeding speed is 520mm / min, and the distance from which the welding wire extends out of the contact tip is 28mm;

[0023] The filling rate of the flux cored wire is 25%.

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PUM

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Abstract

The invention discloses a high-strength low-temperature-resisting flux-cored wire for pipeline steel, and the high-strength low-temperature-resisting flux-cored wire is composed of a flux core and a stainless steel skin wrapping the outer side of the flux core. The flux core comprises, by mass percent, C, Be, Si, Al, Mn, Ni, Cr, Cu, Ti, Sr, Mo, W, V, Nb, Zr, Nd, Sc, B, Ce, Eu, Y and the balance Fe and inevitable impurities. The provided high-strength low-temperature-resisting flux-cored wire for the pipeline steel is reasonable in formula, arc stability is good, welding line forming is attractive, a welding connector has high strength, low temperature resistance and good impact resistance, the bonding strength between the high-strength low-temperature-resisting flux-cored wire and base metal is high, and performance is stable.

Description

technical field [0001] The invention relates to the field of welding wire technology, in particular to a high-strength low-temperature-resistant flux-cored welding wire for pipeline steel. Background technique [0002] Pipeline steel is a steel plate for pipelines, which requires high compressive strength, low temperature toughness and excellent welding performance during use. In order to reduce the cost of long-distance oil and gas transportation, the strength level of pipeline steel has been continuously improved. As a new type of welding material, flux cored wire has the characteristics of simple welding equipment and good welding effect. It is widely used in oil and gas pipelines, bridge construction, automobile manufacturing and petrochemical industries. The welding quality and welding efficiency are determined by the welding material and welding process. At present, X120 grade pipeline steel flux-cored welding wire still has unreasonable component configuration, its a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
CPCB23K35/3086
Inventor 卢齐元
Owner 安徽飞弧焊业股份有限公司
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