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Welding electrode for Ni steel welding

A technology of welding rod and welding rod, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., to achieve the effect of good spreadability, stable arc and smooth surface

Inactive Publication Date: 2014-06-18
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode proposed in this patent is mainly suitable for welding low temperature steel at -70°C, not suitable for welding 3.5%Ni steel at -101°C

Method used

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  • Welding electrode for Ni steel welding
  • Welding electrode for Ni steel welding
  • Welding electrode for Ni steel welding

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Embodiment Construction

[0026] The present invention can be explained in detail through the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0027] The chemical composition requirements of the main raw materials of this patent are shown in Table 1:

[0028] Table 1 Chemical composition requirements of main raw materials

[0029]

[0030]

[0031] The concrete proportioning ratio of embodiment electrode coating composition is as shown in table 2:

[0032] Table 2 Example composition ratio (wt%)

[0033]

[0034] The chemical composition of the deposited metal is shown in Table 3.

[0035] Table 3 Example welding wire and deposited metal chemical composition (wt%)

[0036]

[0037]

[0038] The performance comparison of the embodiments of the present invention is shown in Table 4.

[0039] Table 4. Mechanical properties of the deposited metal in the example (620°C×1h heat trea...

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Abstract

The invention relates to a welding electrode for Ni steel welding. A heat-resistant steel welding electrode comprises an H08E welding core and a cover, wherein the cover contains the following components by weight percent: 20-30% of marble, 13-30% of fluorite, 3-5% of rutile, 8-12% of iron powder, 1-2% of sodium carbonate, 2-4% of silicon iron, 2-4% of ferromanganese, 5-7% of metallic nickel, 1-3% of ferrotitanium, 1-3% of silica powder, 1-3% of flogopite, 1-2% of zircon sand and 17-21% of pure sodium silicate. According to the invention, after the (620+ / -10 DEG C)*1h thermal treatment on the deposited metal, the mechanical property is stable, the strength is suitable, the toughness is better, the production processing property is excellent, the surface of the welding electrode is smooth, the eccentricity is stable, and the yield is high. The electrical arc is stable; the combustion is stable during a welding process; the spreadability and the fusing property are better; the formation of weld is attractive; the dregs-removing property is better.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to an electric welding electrode used for Ni steel welding. Background technique [0002] It is known that 3.5% Ni steel plates are widely used in petrochemical, coal chemical and other fields, but their use conditions are harsh, and the requirements for matching electrodes are also high. However, this type of electrode generally has the problem of low low-temperature impact toughness, which brings a lot of trouble to the construction of pressure-bearing equipment. At present, there are not many patents related to low-temperature steel electrodes at home and abroad. The retrieved patents are: (1) A special electrode for -70°C ferritic low-temperature steel (publication number: CN101879672A). The electrode proposed in this patent is mainly suitable for welding low-temperature steel at -70°C, but not suitable for welding 3.5%Ni steel at -101°C. It is quite different from t...

Claims

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Application Information

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IPC IPC(8): B23K35/365
CPCB23K35/365B23K35/3602
Inventor 聂建航王青云亢天佑刘宏
Owner LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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