Low-nickel austenitic stainless steel flux-cored welding strip and preparation method thereof

A technology of austenitic stainless steel and stainless steel, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of poor corrosion resistance and wear resistance of the cladding layer, reduce strength and corrosion resistance, and improve grain resistance Inter-corrosion performance and the effect of improving corrosion resistance

Pending Publication Date: 2022-07-12
HARBIN WELDING INST LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-nickel austenitic alloy in order to solve the technical problems that the existing welding of stainless steel strips for surfacing r

Method used

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  • Low-nickel austenitic stainless steel flux-cored welding strip and preparation method thereof
  • Low-nickel austenitic stainless steel flux-cored welding strip and preparation method thereof
  • Low-nickel austenitic stainless steel flux-cored welding strip and preparation method thereof

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Embodiment 1

[0030]Embodiment 1: A low-nickel austenitic stainless steel flux-cored welding strip of this embodiment is composed of a 06Cr18Mn5Ni4Cu2N stainless steel sheath and a flux-cored powder filled therein; the flux-cored powder is composed of potassium feldspar: 5%, Rutile: 17%, Zircon Sand: 1%, Al-Mg alloy: 0.5%, Electrolytic Manganese: 22%, Ferrosilicon: 0.5%, Chromium powder: 10%, Nickel powder: 8%, Ferromolybdenum: 0.5%, Copper powder: 5%, metal cobalt powder: 1%, titanium powder: 0.5% and the balance of ferrochromium nitride powder, the nitrogen content of the ferrochromium nitride powder: 8%, the core The particle size of potassium feldspar, rutile and zircon sand in the powder is 80 mesh to 200 mesh, and the particle size of the remaining components is below 80 mesh. The element composition and the mass content of each element in the 06Cr18Mn5Ni4Cu2N stainless steel outer skin are: C: 0.06% , Si: 0.35%, Mn: 5.15%, Ni: 3.50%, Mo: 0.20%, Cu: 1.90%, N: 0.30%, S≤0.001%, P≤0.020%...

Embodiment 2

[0039] Embodiment 2: A low-nickel austenitic stainless steel flux-cored welding strip of this embodiment is composed of a 06Cr18Mn5Ni4Cu2N stainless steel sheath and a flux-cored powder filled therein; the flux-cored powder is composed of potassium feldspar: 6%, Rutile: 20%, Zircon Sand: 1.5%, Al-Mg alloy: 0.85%, Electrolytic Manganese: 24%, Ferrosilicon: 0.8%, Chromium powder: 12%, Nickel powder: 9%, Ferromolybdenum: 1%, Copper powder: 8%, metal cobalt powder: 1.5%, titanium powder: 0.8% and the balance of ferrochromium nitride powder. The nitrogen content of the ferrochromium nitride powder is: 10%. The particle size of potassium feldspar, rutile and zircon sand in the powder is 80 mesh to 200 mesh, and the particle size of the remaining components is below 80 mesh. The element composition and mass content of each element in the 06Cr18Mn5Ni4Cu2N stainless steel outer skin are: C: 0.07% , Si: 0.40%, Mn: 5.45%, Ni: 3.82%, Mo: 0.12%, Cu: 1.96%, N: 0.37%, S≤0.001%, P≤0.020%, the...

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Abstract

The invention discloses a low-nickel austenitic stainless steel flux-cored welding strip and a preparation method thereof. The invention belongs to the technical field of welding material preparation. The invention aims to solve the technical problems that the existing stainless steel welding strip for strip surfacing needs to be matched with a welding flux to protect a molten pool, and the corrosion resistance and the wear resistance of a cladding layer are poor. The invention discloses a low-nickel austenitic stainless steel flux-cored welding strip which is composed of a 06Cr18Mn5Ni4Cu2N stainless steel skin and flux core powder filled in the 06Cr18Mn5Ni4Cu2N stainless steel skin. The flux core powder is formed by mixing, by mass, 5%-7% of potassium feldspar, 17%-20% of rutile, 1%-2% of zircon sand, 0.5%-1% of Al-Mg alloy, 22%-25% of electrolytic manganese, 0.5%-1% of silicon iron, 10%-12% of chromium powder, 8%-10% of nickel powder, 0.5%-1% of ferromolybdenum, 5%-10% of copper powder, 1%-2% of metal cobalt powder, 0.5%-1% of titanium powder and the balance nitrided ferrochrome powder, and the nitrogen content of the nitrided ferrochrome powder is 8%-10%. By adding beneficial elements, the surfacing cladding layer has the advantages of high hardness, wear resistance, corrosion resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of welding material preparation, and particularly relates to a low-nickel austenitic stainless steel flux-cored welding strip and a preparation method thereof. Background technique [0002] Low-nickel austenitic stainless steel is a resource-saving austenitic stainless steel with high strength, good toughness and excellent corrosion resistance that uses N element instead of expensive Ni element as the main austenitizing element. The N element in steel has a high stacking fault energy, which can optimize the microstructure of the material and greatly improve the comprehensive performance of the material. In recent years, it has received continuous attention from chemical equipment, pressure vessels, building decoration, aquaculture and other industries. [0003] Among them, in the manufacturing process of hydrogenation reactor, coal liquefaction reactor and nuclear vessel, strip surfacing technology is often ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/02B23K35/40
CPCB23K35/3073B23K35/3026B23K35/0266B23K35/40
Inventor 徐锴方乃文江来珠黄瑞生武鹏博肖祥勇李伟王星星徐亦楠郭枭徐玉君马一鸣王猛何鹏周珍珍
Owner HARBIN WELDING INST LTD
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