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Low-temperature steel flux-cored wire

A technology of flux-cored welding wire and low-temperature steel, applied in the field of welding material manufacturing, can solve problems such as inability to meet, and achieve the effect of saving nickel resources and excellent welding process performance

Active Publication Date: 2015-03-11
武汉铁锚焊接材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While most of the current CO 2 Flux-cored welding wire for gas shielded welding can only meet the impact test requirements for temperatures above -40°C, and the yield strength level of the deposited metal is not higher than 400MPa, which cannot meet the requirements for ultra-high-strength steel welding with impact toughness requirements of -60°C

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  • Low-temperature steel flux-cored wire
  • Low-temperature steel flux-cored wire
  • Low-temperature steel flux-cored wire

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0025] Examples The formula of the flux-cored welding wire is shown in Table 1, the steel skin is SPCC steel strip, and the conventional flux-cored welding wire manufacturing process is adopted.

[0026] Wherein, the alkali metal oxides in Examples 1-3 are magnesium oxide, the alkali metal oxides in Examples 4-6 are calcium oxide, and the alkali metal oxides in Examples 7-9 are a mixture of magnesium oxide and calcium oxide. Among embodiments 4, 5 and 9, the low-carbon ferromanganese C content of the flux-cored wire≤1.0%, and borax is processed through baking; Wherein the baking time of embodiment 4 and 5 is 60 minutes, and the borax after baking is passed through 80 orders screen.

[0027] Table 1 Flux cored wi...

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Abstract

The invention discloses a low-temperature steel flux-cored wire. The low-temperature steel flux-cored wire is characterized by comprising the following components in percentage by mass: 35-45% of rutile, 1-5% of alkali metal oxides, 15-25% of low-carbon ferromanganese, 4-8% of fluorite, 3-10% of aluminum oxide, 2-6% of aluminum magnesium alloys, 3-10% of ferrosilicon, 3-8% of ferrotitanium, 0.5-2% of borax, 6-9% of nickel powder, and the balance of iron powder. The flux-cored wire is welded by CO2 protective gas, has excellent welding process property and comprehensive performance of deposited metal and a welded joint, and has the yield strength not lower than 460 MPa, the tensile strength not lower than 570 MPa, the elongation not lower than 22% and the Akv not lower than 50 J under the condition of -60 DEG C.

Description

technical field [0001] The invention relates to the field of welding material manufacturing, in particular to a CO 2 Gas shielded welding flux cored wire. Background technique [0002] Flux-cored welding wire has good welding process performance and welding efficiency, and has been used more and more in shipbuilding, marine engineering and other industries. In the construction of offshore oil drilling platforms, low-temperature steel welding materials are required, especially those with good low-temperature impact toughness. cored wire. While most of the current CO 2 Flux-cored welding wire for gas shielded welding can only meet the impact test requirements for temperatures above -40°C, and the yield strength level of the deposited metal is not higher than 400MPa, which cannot meet the ultra-high-strength steel welding with -60°C impact toughness requirements. [0003] CN101450426B announced "low-temperature steel flux-cored welding wire". The powder components include ru...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/0266B23K35/3053B23K35/3608B23K35/368
Inventor 吴光辉张少健王天虎肖庆华
Owner 武汉铁锚焊接材料股份有限公司