A bridge steel q550qe matching flux cored wire

A technology of flux-cored welding wire and bridge, applied in welding equipment, welding medium, welding/cutting medium/material, etc., to achieve the effect of improving comprehensive mechanical properties, improving strength, toughness, crack resistance, and easy slag removal from welds

Active Publication Date: 2020-10-02
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] With the advancement of science and technology and the needs of economic development, 550MPa bridge steel will soon be put into practice, especially Q550qNHE bridge steel, which is resistant to atmospheric corrosion, not only requires a certain strength and toughness, but also requires a certain yield ratio. The smaller the range, the better, and the better corrosion resistance, but there is no matching flux-cored wire for welding Q550qNHE bridge steel

Method used

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  • A bridge steel q550qe matching flux cored wire
  • A bridge steel q550qe matching flux cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Firstly, the following process is carried out: material selection→powder treatment→powder sieving→powder mixing and powder mixing; then select a low-carbon cold-rolled steel strip with a width of 16mm and a thickness of 0.6mm, and press it into a U shape by a molding machine; Good core powder is filled into the U-shaped groove, and the quality of the core powder accounts for 25% of the mass of the flux-cored wire; then the opening of the U-shaped groove is closed to form an O shape, so that the core is wrapped in it, and the wire drawing machine is drawn one by one. Drawing and reducing the diameter to obtain a welding wire of Ф3.2mm, namely the bridge steel Q550qE matching flux-cored welding wire of the present invention.

[0040] The composition and dosage of the drug core are calculated by mass percentage: nano titanium nitride powder 1.8%, nano cerium oxide 1.2%, FeAl8Ba12Ca6Si40 silicon calcium barium aluminum alloy 0.5%, Nb powder 0.35%, Cr powder 1.2%, Ni powder ...

Embodiment 2

[0042] Firstly, the following process is carried out: material selection→powder treatment→powder sieving→powder mixing and powder mixing; then select a low-carbon cold-rolled steel strip with a width of 16mm and a thickness of 0.6mm, and press it into a U shape by a molding machine; Good core powder is filled into the U-shaped groove, and the quality of the core powder accounts for 25% of the mass of the flux-cored wire; then the opening of the U-shaped groove is closed to form an O shape, so that the core is wrapped in it, and the wire drawing machine is drawn one by one. Drawing and reducing the diameter to obtain a welding wire with a diameter of Ф1.8mm, that is, the bridge steel Q550qE matching flux-cored welding wire of the present invention.

[0043] The composition and dosage of the drug core are calculated by mass percentage: 1.3% of nano-titanium nitride powder, 0.8% of nano-cerium oxide, 0.35% of FeAl8Ba12Ca6Si40 silicon-calcium-barium-aluminum alloy, 0.28% of Nb powd...

Embodiment 3

[0045] Firstly, the following process is carried out: material selection→powder treatment→powder sieving→powder mixing and powder mixing; then select a low-carbon cold-rolled steel strip with a width of 16mm and a thickness of 0.6mm, and press it into a U shape by a molding machine; Good core powder is filled into the U-shaped groove, and the quality of the core powder accounts for 25% of the mass of the flux-cored wire; then the opening of the U-shaped groove is closed to form an O shape, so that the core is wrapped in it, and the wire drawing machine is drawn one by one. Drawing and reducing the diameter to obtain a Ф1.2mm welding wire, that is, the bridge steel Q550qE matching flux-cored welding wire of the present invention.

[0046] The composition and dosage of the drug core are calculated by mass percentage: 0.8% of nano titanium nitride powder, 0.5% of nano cerium oxide, 0.2% of FeAl8Ba12Ca6Si40 silicon calcium barium aluminum alloy, 0.2% of Nb powder, 0.8% of Cr powder...

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Abstract

The invention belongs to the technical field of welding materials, and particularly relates to a flux-cored wire matched with bridge steel Q550qE. The flux-cored wire is prepared by coating flux corepowder with a low-carbon cold-rolled steel strip; and the flux core powder accounts for 25%-28% of the total mass of the wire. A flux core is prepared from components including, by mass, 0.8%-1.8% ofnano titanium nitride powder, 0.3%-1.2% of nano cerium oxide, 0.2%-0.5% of a Si-Ca-Ba-Al alloy FeAl8Ba12Ca6Si40, 0.2%-0.35% of Nb powder, 0.8%-1.2% of Cr powder, 2.0%-3.0% of Ni powder, 3.5%-6.0% of Mo powder, 0.5%-1.0% of Cu powder, 5.0%-6.0% of Mn powder, 1.8%-3.0% of NaF powder and the balance Fe powder.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a bridge steel Q550qE matching flux-cored welding wire. [0002] technical background [0003] Flux-cored welding wire is a new welding material, and various welding materials for different purposes can be easily designed by adjusting the type and proportion of the alloy composition of the powder. Flux-cored wire has a wide range of uses, good weld metal quality, strong adaptability to the base metal, and high welding production efficiency. [0004] The matching of the welding material and the base metal, its strength, toughness, and chemical composition are very important for the welding effect. [0005] In addition to high tensile strength, the steel used for bridges also requires a certain yield ratio; the smaller the yield ratio, the stronger the potential ability of the structure to resist damage. Once overloaded, it can also be detected early due to plastic deformation. De...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/30B23K35/3053B23K35/3073B23K35/40B23K35/406
Inventor 刘胜新陈永连明洋孟迪王靖博王瑞娟陈志民
Owner ZHENGZHOU UNIV
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