Gas-shielded flux-cored wire for oil tank corrosion resistant steel and preparation method for gas-shielded flux-cored wire

A gas shielding and flux-cored welding wire technology, which is applied in welding equipment, welding equipment, arc welding equipment, etc., can solve the problems of potential safety hazards, lack of welding consumables for corrosion-resistant steel plates, and failure to meet the requirements of corrosion resistance, etc., to achieve arc stability, The performance of the welding process is good and the effect of improving the overall performance

Active Publication Date: 2016-01-27
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these corrosion-resistant steel plates lack corresponding matching welding consumables, and ordinary steel of the same level cannot meet the requirements of corrosion resistance. After the steel plates are corroded, it will bring great safety hazards

Method used

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  • Gas-shielded flux-cored wire for oil tank corrosion resistant steel and preparation method for gas-shielded flux-cored wire
  • Gas-shielded flux-cored wire for oil tank corrosion resistant steel and preparation method for gas-shielded flux-cored wire
  • Gas-shielded flux-cored wire for oil tank corrosion resistant steel and preparation method for gas-shielded flux-cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A steel strip of (width × thickness) (14 × 0.9) mm is used as the sheath of the welding wire, and its chemical composition is C0.025wt%, Mn0.22wt%, Si0.018wt%, S0.008wt%, P0.01wt%, and the remaining The amount is iron; Taking the preparation and production of 100Kg welding wire as an example, the flux core of this embodiment accounts for 15wt% of the whole welding wire weight, and each component in the flux core is: rutile 4.5kg, ferrosilicon powder: 2.0kg, ferrosilicon powder: 0.5kg, Fluoride: 0.2kg, ferromanganese powder: 0.4kg, nickel powder: 0.3kg, copper powder: 0.15kg, tungsten powder: 0.8kg, antimony powder: 0.6kg and iron powder 5.55Kg; then mix the ingredients in the drug core Uniform and ready for use;

[0041] Put the steel strip in the welding wire forming machine, inject the ready-to-use flux core mixture into the groove of the steel strip bent transversely into a "U" shape, and then roll it into wire, and then finely draw it to ￠1.2mm. .

[0042] The tes...

Embodiment 2

[0050] The sheath of the welding wire is the same as in Example 1. Taking the production of 100Kg welding wire as an example, the flux core of this embodiment accounts for 20wt% of the weight of the entire welding wire. Each component in the flux core is: rutile 5.0kg, ferrosilicon powder: 1.5kg, ferrosilicon powder: 0.4kg, fluoride: 0.3kg, ferromanganese powder: 0.5kg, nickel powder: 0.2kg, copper powder: 0.10kg, tungsten powder: 0.5kg, antimony powder: 0.3kg and iron powder 11.2kg; After each composition is mixed homogeneously in the core, the rest is the same as in Example 1.

[0051] Chemical composition of deposited metal (wt%)

[0052] C mn Si S P Cr Ni Cu W Sb 0.052 0.85 0.22 0.006 0.012 0.026 0.85 0.20 0.12 0.11

[0053] The balance is Fe and impurities

[0054] Mechanical properties of deposited metal (mixed gas):

[0055]

[0056] Diffusion hydrogen content: 4.0mL / 100g

Embodiment 3

[0058] The sheath of the welding wire is the same as in Example 1. Taking the production of 100Kg welding wire as an example, the flux core of this embodiment accounts for 10wt% of the whole welding wire weight, and each component in the flux core is: rutile 3.0kg, ferrosilicon powder: 1.0kg, ferrosilicon powder: 0.2kg, fluoride: 0.15kg, ferromanganese powder: 0.2kg, nickel powder: 0.3kg, copper powder: 0.1kg, tungsten powder: 0.2kg, antimony powder: 0.5kg and iron powder 9.35kg; Stand-by after each composition mixes homogeneously in the core all the other are identical with embodiment 1.

[0059] Chemical composition of deposited metal (wt%)

[0060] C mn Si S P Cr Ni Cu W Sb 0.055 0.55 0.21 0.007 0.013 0.026 0.44 0.22 0.03 0.03

[0061] The balance is Fe and impurities

[0062] Deposited metal mechanical properties (mixed gas)

[0063]

[0064] Diffusible hydrogen content: 4.2mL / 100g.

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Abstract

The invention discloses a gas-shielded flux-cored wire for oil tank corrosion resistant steel and a preparation method for the gas-shielded flux-cored wire. The gas-shielded flux-cored wire for oil tank corrosion resistant steel is composed of low-carbon steel sheath and a flux core which is wrapped in the low-carbon steel sheath, wherein the flux core is prepared from the following components in parts by weight: 3-5 parts of rutile, 1-2 parts of ferrosilicon power, 0.2-0.5 part of ferrotitanium powder, 0.15-0.3 part of fluoride, 0.2-0.5 part of ferro-manganese powder, 0.2-0.3 part of nickel powder, 0.1-0.15 part of copper powder, 0.2-0.8 part of tungsten powder, 0.3-0.6 part of stibium powder, and 5.55-11.2 parts of iron powder. Compared with prior art, the welding process is stable in performance, stable in electric arc, small in splashing, attractive in welding seam forming, and the like; and the gas-shielded flux-cored wire achieves good mechanical property and corrosion resistance.

Description

technical field [0001] The invention relates to a welding material, in particular to a gas-shielded flux-cored welding wire for oil tank corrosion-resistant steel and a preparation method thereof. Background technique [0002] Japan began research on corrosion-resistant steel at the end of the last century. After three years, it has successfully revealed the corrosion, the mechanism of corrosion and the corrosion process in the cargo oil tank, and established the simulation test method for the cargo oil tank of the oil tanker. In 2002, Japanese steel manufacturers began to develop this new type of corrosion-resistant steel based on the above-mentioned research results, and obtained engineering applications. Japan's actual test shows that this kind of steel has good corrosion resistance on the deck and inner bottom of large oil tankers, and the corrosion rate after two and a half years is one-fourth of that of ordinary steel. This kind of corrosion-resistant steel has been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K9/16
CPCB23K9/16B23K35/3053B23K35/406
Inventor 郭栖利蒋勇陈维富明廷泽
Owner ATLANTIC CHINA WELDING CONSUMABLES
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