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Preparation method of nuclear-grade nickel-based high-temperature alloy welding wire material

A technology of nickel-based superalloy and welding wire, which is applied in the field of metal material melting, can solve the problems of reducing the mechanical properties of the alloy and the content of non-metallic elements, and achieves the effects of reliable quality, improved purity and safe use.

Pending Publication Date: 2021-12-03
GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS
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  • Application Information

AI Technical Summary

Problems solved by technology

Vacuum electroslag remelting can reduce the number of nitride-based inclusions; by controlling the MgO content in electroslag and the process parameters of electroslag remelting, the Mg content in the alloy and the number and size of Mg-based oxide inclusions can be precisely controlled. The process is stable and the cost is low; however, this technical solution has not reported the reduction of other non-metallic inclusions and gas content, and due to the different crystallization behaviors of non-metallic substances such as C, O, S, P, and the eutectic produced by metal components The compounds are all different, so this causes a large reduction in the content of non-metallic elements, and the formation of non-metallic inclusions will largely cause the aging of nickel-based superalloys in use, greatly reducing the alloy in use. mechanical properties

Method used

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  • Preparation method of nuclear-grade nickel-based high-temperature alloy welding wire material

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Experimental program
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Effect test

Embodiment 1

[0023] A preparation method of a nuclear-grade nickel-based superalloy welding wire material, comprising the steps of:

[0024] The first step alloy composition design:

[0025] In terms of mass percentage, the alloy composition is: C0.034%, Mn0.99%, Fe8.61%, Cr29.45%, Mo0.4%, Si0.01%, Nb+Ta0.95%, Al0. 13%, Ti0.17%, Co≤0.02%, N≤0.02%, H≤2PPM, O≤30PPM, Co+N+V≤0.5%, Ni balance and trace impurity elements; the impurity elements are expressed in mass percentage Meet the following requirements: S≤0.003%, P≤0.003%, B≤0.003%, As≤0.001%, Sn≤0.0025%, Sb≤0.0025%, Cu≤0.02%, Pb≤0.0025%;

[0026] The second step is raw material selection:

[0027] Selection of raw materials with content of S, P, B, Co, As, Sn, Sb, Cu, Pb elements meeting the following requirements: S≤0.003%, P≤0.003%, B≤0.003%, Co≤0.02%, As≤0.001 %, Sn≤0.0025%, Sb≤0.0025%, Cu≤0.02%, Pb≤0.0025%; raw materials are metal chromium, metal nickel, 1# pure iron, metal tantalum, metal niobium, metal aluminum, metal titanium, gr...

Embodiment 2

[0039] A preparation method of a nuclear-grade nickel-based superalloy welding wire material, comprising the steps of:

[0040] The first step alloy composition design:

[0041] In terms of mass percentage, the alloy composition is: C0.04%, Mn0.60%, Fe7.00%, Cr28.0%, Mo0.30%, Si0.10%, Nb+Ta1.0%, Al0. 25%, Ti0.35%, Co0.02%, N0.02%, H2PPM, O30PPM, Co+N+V 0.5%, Ni balance and trace impurity elements; the impurity elements meet the following requirements in mass percentage: S≤0.003%, P≤0.003%, B≤0.003%, As≤0.001%, Sn≤0.0025%, Sb≤0.0025%, Cu≤0.02%, Pb≤0.0025%;

[0042] The second step is raw material selection:

[0043] Selection of raw materials with content of S, P, B, Co, As, Sn, Sb, Cu, Pb elements meeting the following requirements: S≤0.003%, P≤0.003%, B≤0.003%, Co≤0.02%, As≤0.001 %, Sn≤0.0025%, Sb≤0.0025%, Cu≤0.02%, Pb≤0.0025%; raw materials are metal chromium, metal nickel, 1# pure iron, metal tantalum, metal niobium, metal aluminum, metal titanium, graphite block, Metal...

Embodiment 3

[0051] A preparation method of a nuclear-grade nickel-based superalloy welding wire material, comprising the steps of:

[0052] The first step alloy composition design:

[0053] In terms of mass percentage, the alloy composition is: C0.04%, Mn0.60%, Fe7.00%, Cr28.0%, Mo0.30%, Si0.10%, Nb+Ta1.0%, Al0. 25%, Ti0.35%, Co0.02%, N0.02%, H 2PPM, O30PPM, Co+N+V 0.5%, Ni balance and trace impurity elements; the impurity elements meet the following requirements in mass percentage : S≤0.003%, P≤0.003%, B≤0.003%, As≤0.001%, Sn≤0.0025%, Sb≤0.0025%, Cu≤0.02%, Pb≤0.0025%;

[0054] The second step is raw material selection:

[0055] Selection of raw materials with content of S, P, B, Co, As, Sn, Sb, Cu, Pb elements meeting the following requirements: S≤0.003%, P≤0.003%, B≤0.003%, Co≤0.02%, As≤0.001 %, Sn≤0.0025%, Sb≤0.0025%, Cu≤0.02%, Pb≤0.0025%; raw materials are metal chromium, metal nickel, 1# pure iron, metal tantalum, metal niobium, metal aluminum, metal titanium, graphite block, Met...

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Abstract

The invention belongs to the technical field of metal material melting, and particularly relates to a preparation method of a nuclear-grade nickel-based high-temperature alloy welding wire material. According to the method, the material is prepared through alloy component optimization design, vacuum induction melting, gas protection electroslag remelting and vacuum consumable remelting triple process melting, the purity of a steel ingot is improved, the contents of non-metallic inclusions and gas in the steel ingot are also reduced, the prepared nickel-based high-temperature alloy material completely meets the standard requirements for the nuclear-grade nickel-based high-temperature alloy welding wire material, and therefore it is guaranteed that a nuclear-grade nickel-based high-temperature alloy welding wire for main equipment of a nuclear power station is reliable in quality and safe to use.

Description

technical field [0001] The invention belongs to the technical field of metal material smelting, and in particular relates to a preparation method of a nuclear-grade nickel-based superalloy welding wire material. Background technique [0002] Nickel-based superalloys are widely used in high-end equipment manufacturing fields such as aviation, aerospace, and nuclear energy because of their excellent high temperature resistance, oxidation resistance, and corrosion resistance. In the field of nuclear power, it is the main material widely used in the main equipment of nuclear islands such as reactor pressure vessels, steam generators, voltage stabilizers, and waste heat removal heat exchangers. During the application process, nickel-based superalloys are often subject to alternating and complex stresses such as high temperature, high pressure, and creep, as well as strong corrosion, which requires their welding materials to have high strength, high plasticity, high toughness, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/03C22B9/18B23K35/30
CPCC22C19/053C22C19/055C22C1/023C22C1/03C22B9/18C22B9/006B23K35/304Y02P10/25
Inventor 万东海王卫东张令王付敏张自生刘远彬文恒玉刘裔兴贾达永
Owner GUIZHOU AEROSPACE XINLI CASTINGSAND FORGINGS
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