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Gas-shielded flux-cored wire for 20 chromium steel for nuclear power and welding method thereof

A technology of flux-cored welding wire and nuclear power, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems of continuous automatic welding, lack of flux-cored welding wire, low production efficiency, etc. The effect of good position operation process and stable welding arc

Active Publication Date: 2018-05-18
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the welding materials for nuclear power 20-controlled chromium steel are mainly welding rods and solid welding wires, but there is a lack of matching flux-cored welding wires, and the following shortcomings exist in the use of welding rods and solid-cored welding wires: welding rods can only be used for manual welding , can not be continuously and automatically welded, and the production efficiency is low; although the solid core wire can realize automatic welding, the production efficiency is high, but the process performance is poor

Method used

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  • Gas-shielded flux-cored wire for 20 chromium steel for nuclear power and welding method thereof
  • Gas-shielded flux-cored wire for 20 chromium steel for nuclear power and welding method thereof

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Embodiment 1

[0031] This embodiment provides 20 chromium-controlled steel gas-shielded flux-cored welding wire for nuclear power, including a carbon steel sheath and a flux core. The flux core accounts for 16% of the total mass of the flux-cored welding wire. The composition and content of the flux core account for the total mass percentage of the flux core as follows : Fluorite: 35%, Rutile: 20%, Feldspar: 2%, 45 #Ferrosilicon: 7%, rare earth fluoride: 1%, magnesium powder: 2%, electrolytic manganese: 15%, nickel powder: 1.5%, copper powder: 2%, chromium powder: 2%, the balance is Fe and unavoidable of impurities. Among them, the carbon steel sheath adopts low S, P carbon steel strip, the chemical composition of the carbon steel strip is C: 0.052%, Si: 0.25%, Mn: 0.24%, S: 0.005%, P: 0.006% , and the balance is iron. The preparation method of using the components in this embodiment to prepare the flux-cored wire is the same as that of the prior art, and the diameter of the prepared flux...

Embodiment 2

[0034] This embodiment provides 20 chromium-controlled steel gas-shielded flux-cored welding wire for nuclear power, including a carbon steel sheath and a flux core. The flux core accounts for 20% of the total mass of the flux-cored welding wire, and the composition and content of the flux core account for the total mass of the flux core. The percentages are as follows: Fluorite: 20%, Rutile: 10%, Feldspar: 1%, 45 # Ferrosilicon: 5%, rare earth fluoride: 0.5%, magnesium powder: 1%, electrolytic manganese: 8%, nickel powder: 1%, copper powder: 1%, chromium powder: 1%, the balance is Fe and unavoidable of impurities. Among them, the carbon steel sheath adopts low S, P carbon steel strip, the chemical composition of the carbon steel strip is C: 0.052%, Si: 0.25%, Mn: 0.24%, S: 0.005%, P: 0.006% , and the balance is iron. The preparation method of using the components in this embodiment to prepare the flux-cored wire is the same as that of the prior art, and the diameter of the ...

Embodiment 3

[0037] This embodiment provides 20 chromium-controlled steel gas-shielded flux-cored welding wire for nuclear power, including a carbon steel sheath and a flux core. The flux core accounts for 18% of the total mass of the flux-cored welding wire, and the composition and content of the flux core account for the total mass of the flux core. The percentages are as follows: Fluorite: 28%, Rutile: 15%, Feldspar: 1.5%, 45% # Ferrosilicon: 6%, rare earth fluoride: 0.7%, magnesium powder: 1.5%, electrolytic manganese: 12%, nickel powder: 1.3%, copper powder: 1.5%, chromium powder: 1.5%, the balance is Fe and unavoidable of impurities. Among them, the carbon steel sheath adopts low S, P carbon steel strip, the chemical composition of the carbon steel strip is C: 0.052%, Si: 0.25%, Mn: 0.24%, S: 0.005%, P: 0.006% , and the balance is iron. The preparation method of using the components in this embodiment to prepare the flux-cored wire is the same as that of the prior art, and the diam...

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Abstract

The invention provides a gas-shielded flux-cored wire for 20 chromium steel for nuclear power. The gas-shielded flux-cored wire comprises a carbon steel sheath and a flux core, wherein the carbon steel sheath is 80-84% of the total mass of the flux core, and the flux core is 16-20% of the total mass of the flux-cored wire; the flux core comprises the following components in percentage by total mass: 20-35% of fluorite, 10-20% of rutile, 1-2% of feldspar, 5-7% of 45 silicon iron, 0.5-1% of rare earth fluoride, 1-2% of magnesium powder, 8-15% of electrolytic manganese, 1-1.5% of nickel powder, 1-2% of copper powder, 1-2% of chromium powder and the balance of Fe and unavoidable impurities. The flux-cored wire is matched with CO2 gas shield and has the advantages of stable arc welding, uniformmelting, good fluidity of melting slag and beautiful weld appearance. The 30 DEG C KV2 mean value of deposited metal is larger than 100J, and the content of diffusible hydrogen is less than 5.0mL / 100g. The gas-shielded flux-cored wire meets the performance requirement of the welding process and is suitable for all-position welding.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a 20-control chromium steel gas-shielded flux-cored welding wire for nuclear power. Background technique [0002] 20-controlled chromium steel is a steel type developed during the localization process of CPR1000 pressurized water reactor nuclear power plants. A certain amount of chromium is added to carbon steel to improve the anti-fluid accelerated corrosion performance (that is, anti-FAC performance) of the pipeline. The island mainly uses one of the steel materials. [0003] At present, the welding materials for nuclear power 20-controlled chromium steel are mainly welding rods and solid welding wires, but there is a lack of matching flux-cored welding wires, and the following shortcomings exist in the use of welding rods and solid-cored welding wires: welding rods can only be used for manual welding , can not be continuously and automatically welded, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K9/16
CPCB23K9/16B23K35/0266B23K35/3073B23K35/3605B23K35/368
Inventor 田海成徐文福张东海刘玉双韩海峰张亚平
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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