Flux-cored wire of low-temperature steel

A technology of flux-cored welding wire and low-temperature steel, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor arc stability, more spatter, and high cost, and achieve low-temperature impact toughness and low-temperature crack resistance. Good, excellent low temperature impact toughness, good arc stability

Inactive Publication Date: 2010-10-06
NANTONG CHENXI WELDING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the demand for low-temperature steel flux-cored wires for welding low-temperature steels has increased, and the low-temperature steel flux-cored wires currently used have poor low-temperature impact toughness and low-temperature crack resistance because of the poor low-temperature impact toughness and low-temperature crack resistanc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: adopt cold-rolled SPCC steel strip to manufacture flux-cored welding wire, the chemical composition of the steel strip is 0.05% for carbon, 0.35% for silicon, 1.2% for manganese, 0.01% for sulfur, 0.013% for phosphorus, and 1% for nickel %, the filling rate of the powder is 10-20%, and the diameter of the welding wire is 1.2mm. The chemical composition of the medicinal powder is 33g of titanium dioxide, 6g of silicon dioxide, 13g of silicon-manganese alloy, 12g of nickel powder, 15g of feldspar, 5g of ferrotitanium, and 16g of medium-carbon ferromanganese.

Embodiment 2

[0012] Embodiment 2: adopt cold-rolled SPCC steel strip to manufacture flux-cored welding wire, and the chemical composition of its steel strip is that carbon is 0.05%, silicon is 0.35%, manganese is 1.2%, sulfur is 0.01%, phosphorus is 0.013%, and nickel is 1% %, the filling rate of the powder is 10-20%, and the diameter of the welding wire is 1.2mm. The chemical composition of the medicinal powder is 34g of titanium dioxide, 5g of silicon dioxide, 12g of silicon-manganese alloy, 10g of nickel powder, 10g of feldspar, 4g of ferrotitanium, and 15g of medium-carbon ferromanganese.

Embodiment 3

[0013] Embodiment three: adopt cold-rolled SPCC steel strip to manufacture flux-cored welding wire, and the chemical composition of its steel strip is that carbon is 0.05%, silicon is 0.35%, manganese is 1.2%, sulfur is 0.01%, phosphorus is 0.013%, and nickel is 1% %, the filling rate of the powder is 10-20%, and the diameter of the welding wire is 1.2mm. The chemical composition of the medicinal powder is 35g of titanium dioxide, 8g of silicon dioxide, 10g of silicon-manganese alloy, 11g of nickel powder, 13g of feldspar, 5g of titanium ferromanganese, and 18g of medium carbon ferromanganese.

[0014] When using this welding wire for welding, it not only has excellent welding process performance, stable arc, less spatter, easy slag removal, good low-temperature impact toughness, good low-temperature crack resistance, and can perform all-position welding including downward welding.

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Abstract

The invention discloses a flux-cored wire of low-temperature steel. Powder of the flux-cored wire comprises the following chemical components in percentage by weight: 33-35 percent of titanium dioxide, 4-8 percent of silicon dioxide, 10-13 percent of silicon manganese alloy, 10-12 percent of nickel powder, 3-5 percent of ferrotitanium and 14-18 percent of medium carbon ferromanganese. The invention has the advantages of slant acidity slag system, favorable electric arc stability, little splash, easy deslagging, favorable low-temperature impact toughness, favorable low-temperature crack resistance, high efficiency and lower cost.

Description

Technical field: [0001] The invention belongs to the field of metal welding, in particular to a low-temperature steel flux-cored welding wire. Background technique: [0002] In the existing technology, steel structures for offshore operations such as drilling derricks and production platforms are mainly used, including liquefied petroleum gas ships, refrigeration ships and other ships, production equipment in cold regions, oil pipelines and other steel structures. In order to prevent brittle failure at low temperature, low temperature steel is often used for construction. However, with the increasing exploitation of offshore oil and natural gas, and the expansion of the mining area from the warm shallow sea area to the cold deep sea area, low-temperature steel will be used extensively in marine structural parts. As a result, the demand for low-temperature steel flux-cored wires for welding low-temperature steels has increased, and the low-temperature steel flux-cored wires ...

Claims

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Application Information

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IPC IPC(8): B23K35/368
Inventor 赵小龙
Owner NANTONG CHENXI WELDING
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