Nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored wire and preparation method thereof

A high-nitrogen austenitic and flux-cored welding wire technology, which is applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of low-temperature impact toughness of welded joints, improve the ability of stress corrosion resistance, improve stability, The effect of excellent welding processability

Active Publication Date: 2021-07-23
BEIJING JINWEI WELDING MATERIAL +2
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Problems solved by technology

[0004] The invention provides a nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored welding wire and its preparation to solve the technical problem that the low-temperature impact toughness of the welded joint is not high when welding high-nitrogen and low-nickel austenitic stainless steel. method

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  • Nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored wire and preparation method thereof

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Effect test

Embodiment 1

[0027] Embodiment 1: A kind of nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored welding wire of the present embodiment is made of core powder and a stainless steel sheath wrapped outside the core powder (thickness is 0.4mm, width is 430 low carbon Stainless steel strip, in which impurity elements and their mass content are P≤0.020%, S≤0.005%); the drug core powder is composed of rutile: 17%, potassium feldspar: 2%, zircon sand : 1.2%, fluorite: 0.5%, cryolite: 1%, copper powder: 8.8%, aluminum-iron alloy: 0.5%, electrolytic manganese: 35.5%, atomized ferrosilicon: 2%, silicon-calcium alloy: 1.3%, metal Nickel: 10%, ferromolybdenum: 1.2%, ferro-niobium: 1%, ferro-titanium: 1%, metal chromium nitride: 17% mixed; the nitrogen content in chromium nitride metal is 9%, and the drug core powder The particle size of the flux-cored wire is 60-80 mesh, and the filling rate of the core powder in the flux-cored wire is 24%.

[0028] The method for preparing ...

Embodiment 2

[0034] Embodiment 2: A kind of nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored welding wire of the present embodiment is made of core powder and a stainless steel sheath wrapped outside the core powder (thickness is 0.4mm, width is 430 low-carbon Stainless steel strip, in which impurity elements and their mass content are P≤0.020%, S≤0.005%); the drug core powder is composed of rutile: 17.0%, potassium feldspar: 2%, zircon sand : 1%, fluorite: 0.5%, cryolite: 1%, copper powder: 8.9%, aluminum-iron alloy: 0.5%, electrolytic manganese: 36%, atomized ferrosilicon: 2%, silicon-calcium alloy: 2.4%, metal Nickel: 9%, ferromolybdenum: 1.2%, ferro-niobium: 1%, ferro-titanium: 1%, metal chromium nitride: 16.5% mixed; the nitrogen content in chromium nitride metal is 9%, and the drug core powder The particle size of the flux-cored wire is 60-80 mesh, and the filling rate of the core powder in the flux-cored wire is 24%.

[0035] The method for preparing a...

Embodiment 3

[0041] Embodiment 3: A kind of nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored welding wire of the present embodiment is made of core powder and a stainless steel sheath wrapped outside the core powder (thickness is 0.4mm, width is 430 low-carbon Stainless steel strip, in which impurity elements and their mass content are P≤0.020%, S≤0.005%); the drug core powder is composed of rutile: 17.5%, potassium feldspar: 2%, zircon sand : 1.5%, fluorite: 0.5%, cryolite: 1%, copper powder: 8.5%, aluminum-iron alloy: 0.5%, electrolytic manganese: 35%, atomized ferrosilicon: 2%, silicon-calcium alloy: 1.6%, metal Nickel: 10%, ferromolybdenum: 1.4%, ferro-niobium: 1%, ferro-titanium: 1%, metal chromium nitride: 16.5%; the nitrogen content in chromium nitride metal is 9%, and the core powder The particle size of the cored wire is 60-80 mesh, and the filling rate of the core powder in the flux-cored wire is 25%.

[0042] The method for preparing a nickel-savin...

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Abstract

The invention discloses a nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored wire and a preparation method thereof, and belongs to the technical field of welding materials and welding material manufacturing processes. The technical problem that when high-nitrogen low-nickel austenitic stainless steel is welded at present, the low-temperature impact toughness of a welding joint is not high is solved. The flux-cored wire is prepared from flux core powder and a stainless steel skin wrapping around the flux core powder, the flux core powder is formed by mixing rutile, potassium feldspar, zircon sand, fluorite, cryolite, copper powder, aluminum-iron alloy, electrolytic manganese, atomized ferrosilicon, silicon-calcium alloy, metal nickel, ferromolybdenum, ferrocolumbium, ferrotitanium and nitrided metal chromium. the method comprises the following steps that the mineral powder is dried in batches and mixed with the dried alloy powder, then the outer skin is filled with the mixture, rolling and drawing diameter reducing are conducted, and the flux-cored wire is obtained. According to the nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored wire and the preparation method thereof, the welding wire is excellent in low-temperature mechanical property.

Description

technical field [0001] The invention belongs to the technical field of welding material and welding material manufacturing technology, and in particular relates to a nickel-saving high-nitrogen austenitic stainless steel gas-shielded flux-cored welding wire and a preparation method thereof. Background technique [0002] Traditional austenitic stainless steel uses chromium and nickel as the main alloying elements. Among them, nickel can form and stabilize austenite elements. The combination of nickel and chromium and other elements makes it have excellent corrosion resistance and mechanical properties, and is widely used. [0003] In view of the current situation that the reserves of nickel alloys are constantly decreasing and the price is high, the method of replacing the alloying element nickel with nitrogen on the one hand achieves the purpose of saving chromium, and on the other hand provides more effective help for the improvement of various properties of austenitic stain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3026B23K35/3053B23K35/406B23K35/0266
Inventor 李伟王立志方乃文崔晓东曲维春徐亦楠杨义成马一鸣
Owner BEIJING JINWEI WELDING MATERIAL
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