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A low-nickel nitrogen-containing austenitic stainless steel flux-cored wire and preparation method thereof

A technology of austenitic stainless steel and flux-cored wire, applied in welding equipment, manufacturing tools, welding media, etc., can solve problems such as hot cracks in the weld zone, nitride pitting in the zone, loss of nitrogen elements, etc., and achieve excellent comprehensive performance Effect

Active Publication Date: 2020-12-11
HARBIN WELDING INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems of nitrogen element loss, pores, hot cracks in the weld zone and pitting corrosion caused by nitride precipitation in the heat-affected zone in the welded joint when welding low-nickel nitrogen-containing austenitic stainless steel. Provided is a low-nickel nitrogen-containing austenitic stainless steel flux-cored welding wire and a preparation method thereof

Method used

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  • A low-nickel nitrogen-containing austenitic stainless steel flux-cored wire and preparation method thereof

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specific Embodiment approach 1

[0026] Embodiment 1: A low-nickel nitrogen-containing austenitic stainless steel flux-cored wire in this embodiment is prepared from a flux core and a stainless steel sheath (a SUS430 stainless steel strip with a width of 9.8 mm and a thickness of 0.4 mm). No gas protection is required;

[0027] The drug core is formed by mixing alloy components and slag, and the sum of the mass fractions of each component in the drug core is 100%;

[0028] The alloy components are composed of electrolytic manganese: 28%, ferrosilicon: 2.5%, metal chromium: 16%, metal nickel: 12.5%, molybdenum ferro: 0.8%, copper powder: 8.5% and ferrochromium nitride powder according to the mass fraction : 6% mixed;

[0029] The slag is composed of composite fluoride: 5%, carbonate mixture: 3%, potassium feldspar: 2%, rutile: 10.7%, zircon sand: 2% and Al-Mg alloy: 3% by mass fraction made.

[0030] The composite fluoride is formed by mixing barium fluoride: sodium fluoride: magnesium fluoride: calcium flu...

specific Embodiment approach 2

[0039] Embodiment 2: A low-nickel nitrogen-containing austenitic stainless steel flux-cored wire in this embodiment is prepared from a flux core and a stainless steel sheath (a SUS430 stainless steel strip with a width of 9.8mm and a thickness of 0.4mm). No gas protection is required;

[0040] The drug core is formed by mixing alloy components and slag, and the sum of the mass fractions of each component in the drug core is 100%;

[0041] The alloy components are composed of electrolytic manganese: 28%, ferrosilicon: 2.5%, metal chromium: 15%, metal nickel: 12.2%, molybdenum ferro: 0.8%, copper powder: 8.5% and ferrochromium nitride powder according to the mass fraction : 7% mixed;

[0042] The slag is composed of composite fluoride: 6%, carbonate mixture: 2%, potassium feldspar: 2%, rutile: 11%, zircon sand: 2% and Al-Mg alloy: 3% by mass fraction made.

[0043] The composite fluoride is formed by mixing barium fluoride: sodium fluoride: magnesium fluoride: calcium fluorid...

specific Embodiment approach 3

[0052] Specific embodiment three: a low-nickel nitrogen-containing austenitic stainless steel flux-cored wire in this embodiment is prepared from a flux core and a stainless steel sheath (a SUS430 stainless steel strip with a width of 9.8 mm and a thickness of 0.4 mm). No gas protection is required;

[0053]The drug core is formed by mixing alloy components and slag, and the sum of the mass fractions of each component in the drug core is 100%;

[0054] The alloy components are composed of electrolytic manganese: 28%, ferrosilicon: 2.5%, metal chromium: 14%, metal nickel: 12.2%, molybdenum ferro: 0.8%, copper powder: 8.5% and ferrochromium nitride powder according to the mass fraction : 8% mixed;

[0055] The slag is composed of composite fluoride: 7%, carbonate mixture: 1%, potassium feldspar: 2%, rutile: 12%, zircon sand: 2% and Al-Mg alloy: 2% by mass fraction made.

[0056] The composite fluoride is formed by mixing barium fluoride: sodium fluoride: magnesium fluoride: c...

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Abstract

A low-nickel nitrogen-containing austenitic stainless steel flux-cored welding wire and a preparation method thereof. The invention belongs to the technical field of welding materials. The invention aims to solve the technical problems of pitting corrosion caused by nitrogen element loss, pores, hot cracks in the weld zone and nitride precipitation in the heat-affected zone in welded joints when welding low-nickel nitrogen-containing austenitic stainless steel. The flux-cored welding wire of the present invention is prepared from a flux core and a stainless steel sheath, and does not require gas protection during welding; the flux core is formed by mixing alloy components and slag; the alloy components are composed of electrolytic manganese, silicon Iron, metal chromium, metal nickel, ferromolybdenum, copper powder and ferrochromium nitride powder are mixed; the slag is composed of composite fluoride, carbonate mixture, potassium feldspar, rutile, zircon sand and Al-Mg alloy mixed. Method: After mixing the alloy components and slag system, filling it in the stainless steel sheath, drawing and reducing the diameter to obtain the low-nickel nitrogen-containing austenitic stainless steel flux-cored welding wire.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a low-nickel nitrogen-containing austenitic stainless steel flux-cored welding wire and a preparation method thereof. Background technique [0002] Low-nickel-nitrogen-containing austenitic stainless steel mainly uses nitrogen to partially or even completely replace the alloying element nickel to obtain a single-phase austenite structure. The use of nitrogen for alloying has many advantages. For example, compared with carbon, nitrogen is more effective in solidifying Nitrogen is a strong austenite forming element, which can save nickel content and reduce the chance of ferrite and deformed martensite formation. Nitrogen can greatly improve the pitting resistance of materials ability. [0003] Low-nickel nitrogen-containing austenitic stainless steel has good plasticity, corrosion resistance, and high temperature resistance, and is widely used in industries s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/3026B23K35/368B23K35/40B23K35/0266B23K35/3086B23K35/406C22C38/002C22C38/02C22C38/42C22C38/44C22C38/58C22C38/001
Inventor 方乃文徐锴许可贵陈波马一鸣徐亦楠齐万利
Owner HARBIN WELDING INST LTD
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