Corrosion-resistant flux-cored welding wire used for gas shielded welding

A gas shielded welding and corrosion resistance technology, applied in welding media, manufacturing tools, welding equipment, etc., can solve the problem of poor sulfuric acid dew point corrosion effect, etc. stable effect

Inactive Publication Date: 2012-12-19
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these kinds of welding wires are not effective against sulfuric acid dew point corrosion

Method used

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  • Corrosion-resistant flux-cored welding wire used for gas shielded welding
  • Corrosion-resistant flux-cored welding wire used for gas shielded welding
  • Corrosion-resistant flux-cored welding wire used for gas shielded welding

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Experimental program
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Embodiment Construction

[0027] Below in conjunction with specific embodiment the present invention is described in detail,

[0028] In the welding wire of the present invention, the percentages of the alloy elements in the alloy powder in the total mass of the welding wire are: C: 0.03% to 0.08%, Si: 0.3% to 0.7%, Mn: 1.1% to 1.5%, Cu: 0.2% to 0.5% %, Cr: 0.4%~0.8%, Ni: 0.2%~0.6%, Ti: 0.03%~0.1%, Sb: 0.02%~0.10%, S≤0.015%, P≤0.02%, while controlling Cu / Sb elements The scale range is between 4.0 and 8.0. Flux-cored welding wire is produced by using cold-rolled steel strip, the thickness of which is 0.9mm, and the width is 10mm. The particle size of the alloy powder used is 80-100 mesh. After the steel strip is rolled by a flux-cored wire rolling mill, the shape of the end face turns into V-U-O in turn, and the alloy powder is mixed evenly and added to the welding wire when the welding wire is rolled to a U shape according to a certain filling rate, and finally it can be formed into a φ4.6mm powder ...

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Abstract

The invention discloses a corrosion-resistant flux-cored welding wire used for gas shielded welding; the flux-cored welding wire is characterized in that the chemical components and content of the alloy powder in percentage by total weight of the wire are as follows: 0.03%-0.08% of C, 0.3%-0.7% of Si, 1.1%-1.5% of Mn, less than or equal to 0.015% of S, less than or equal to 0.02% of P, 0.2%-0.5% of Cu, 0.4%-0.8% of Cr, 0.2%-0.6% of Ni, 0.03%-0.1% of Ti, 0.02%-0.10% of Sb, and the balance of iron and unavoidable impurity; and meanwhile, the ratio of Cu and Sb elements is controlled to be within the range of 4.0-8.0. The wire deposited metal and the welded have excellent mechanical property, the deposited metal has the tensile strength of more than 550MPa and has the impact toughness of more than 60J at (-40) DEG C. The gas shielded welding wire has the combination property of air-corrosion resistance and sulphuric acid dew point corrosion resistance, and meanwhile, the wire is wide in welding parameter adjustment range, stable in welding process and attractive in the formed welding line, so that the wire is beneficial to the all-position welding.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a corrosion-resistant welding material, in particular to a gas-shielded welding flux-cored wire with corrosion resistance. Background technique [0002] In industrial production, fuels such as heavy oil or coal usually contain a relatively high amount of sulfur. The flue gas produced during the combustion of these fuels contains various forms of sulfur oxides, which combine with water vapor in the flue gas to form sulfurous acid And sulfuric acid, when the ambient temperature is below 150 °C, the sulfuric acid in the flue gas will have a dew point, resulting in the phenomenon of "sulphuric acid dew point corrosion", which will seriously damage the combustion and heat exchange system equipment. Different from ordinary atmospheric corrosion phenomena, sulfuric acid dew point corrosion not only corrodes ordinary carbon steel, but also can corrode stainless steel, which is extremely harm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K9/16
Inventor 刘芳芳付魁军王佳骥吕冬及玉梅郭晓宏
Owner ANGANG STEEL CO LTD
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