Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding

A technology of gas shielded welding and low-alloy steel, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems that are not suitable for all-position welding of low-alloy high-strength steel, cannot guarantee low-temperature impact toughness, and achieve good arc stability and welding operation performance, maintaining arc stability and welding operation performance, increasing corrosion resistance and weld strength

Inactive Publication Date: 2008-01-16
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The above-mentioned flux-cored wire is obviously not suitable for all-position welding of low-alloy high-strength steel, and cannot guarantee low-temperature impact toughness below -40°C

Method used

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  • Low alloy steel flux-cored welding wire for carbon dioxide gas protection welding

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with accompanying drawing description and specific embodiment:

[0032] The steel sheath of the flux-cored wire is made of low-carbon steel, and its chemical composition is shown in Table 1.

[0033] Table 1: Chemical Composition % of Flux Cored Wire Steel Sheath

[0034] C

[0035] The sum of the contents of other components S, P, Sn and Bi in the flux core and carbon steel sheath of the present invention should be less than 0.035 in % of the total weight of the welding wire, wherein S is less than 0.015, P is less than 0.020, Sn is less than 0.001, and Bi is less than 0.001.

[0036] The chemical composition and raw material composition of the drug core powder are shown in Table 2.

[0037] Table 2: Composition of drug core powder

[0038] Core composition

[0039] The outer skin (14 mm wide and 0.9 mm thick) made of low carbon steel strip is filled with core powder, ...

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Abstract

Disclosed is a low alloy steel drug core welding wire used in the carbon dioxide arc welding. The components of the drug core and the content occupying the total weight of the welding wire(percent ratio) are as following: Ti01 3-6, Si 0.3-0.5, Mn 1.5-3.2, Si02 0.1-0.8,Zr02 0.1-0.5, Fe 2-7, Al plus Mg 0.5-1.2, Ni 0.5 -5, B 0.002-0.015, Ti 0.1-0.3; oxide or fluoride of alkali metal K, Na and Li is converted into the content of K, Na and Li, that is, 0.1-0.35; the content of fluoride F is 0.05-0.2; fluoride or oxide of rare earth metal is converted into the content of the rare earth metal, that is, 0.005-0.2; the product of the contents of C, Si and Mn in the welding wire is 0.058-0.11. The invention has good process property for the whole position welding of high strength low alloy steel, and can keep good stability of electric arc and welding operating property in the conditions of large current and fast-speed welding with smooth welding seam, high connecting intensity, good impact toughness minus 40 DEG C low temperature and good crack resistance.

Description

Technical field [0001] The invention relates to a welding material for metal welding, in particular to a low-alloy steel flux-cored welding wire for carbon dioxide gas shielded welding. Background technique [0002] Carbon dioxide gas-shielded flux-cored welding is compatible with the advantages of welding rods and gas-shielded solid wire welding, with high production efficiency and good welding process performance. Therefore, this welding method has been widely used in the processing and manufacturing of steel structures such as ships and bridges. Because of this, the functional requirements for flux-cored welding wire are getting higher and higher. It is required that the flux-cored welding wire can not only adapt to faster welding speed, but also have good arc stability and welding operation performance; Chinese patent announcement number: CN 1775452C, date of announcement: May 24, 2006, the name of the invention is "Carbon Steel Flux-Cored Wire for Gas Shielded Welding"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K9/16
Inventor 卢济培杜晓琪
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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