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Nickel-base alloy welding material, welding material for nuclear reactor, nuclear power apparatus and nuclear power structure, and method of repairing nuclear power apparatus and nuclear power structure

A technology of welding materials and nickel-based alloys, applied in welding equipment, welding equipment, welding/cutting media/materials, etc., can solve the problem of alloy SCC sensitivity reduction and other issues

Pending Publication Date: 2020-12-01
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if the proportion of Cr contained in the alloy is increased, the SCC susceptibility of the alloy can be reduced

Method used

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  • Nickel-base alloy welding material, welding material for nuclear reactor, nuclear power apparatus and nuclear power structure, and method of repairing nuclear power apparatus and nuclear power structure
  • Nickel-base alloy welding material, welding material for nuclear reactor, nuclear power apparatus and nuclear power structure, and method of repairing nuclear power apparatus and nuclear power structure
  • Nickel-base alloy welding material, welding material for nuclear reactor, nuclear power apparatus and nuclear power structure, and method of repairing nuclear power apparatus and nuclear power structure

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Embodiment

[0059] Hereinafter, specific examples of the present embodiment will be described in detail with reference to the drawings and tables. In addition, this embodiment is not limited to these Examples.

[0060] (step 1) figure 1 It is a comparative table showing the chemical composition about each nickel base alloy welding material. Four compositions of A, B, C, and D are shown as nickel-based alloy welding materials.

[0061] In order to obtain nickel-based alloy welding materials having these chemical compositions, necessary raw materials were melted in a vacuum induction melting furnace to manufacture ingots of about 150 mm square by about 450 mm in length. Thereafter, a forged product of Φ60 mm×about 1000 mm was produced by forging, and it was set to Φ9.5 mm by roll rolling. Furthermore, after peeling (peeling) the surface, it was made into the wire of Φ1.2 mm by wire drawing. In this manner, it was confirmed that welding materials can be produced for the four types of nic...

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Abstract

A nickel-base alloy welding material with good SCC resistance and excellent welding performance is provided. The welding material according to an embodiment comprises: larger than 30.0% and less thanor equal to 36.0% by mass of Cr (chromium); less than or equal to 0.050% by mass of C (carbon); larger than or equal to 1.00% and less than or equal to 3.00% by mass of Fe (iron); less than or equal to 0.50% by mass of Si (silicon); less than or equal to 3.00% by mass of Nb (niobium)+Ta (tantalum); less than or equal to 0.70% by mass of Ti (titanium); larger than or equal to 0.10% and less than orequal to 3.50% by mass of Mn (manganese); less than or equal to 0.5% by mass of Cu (copper), with the balance being Ni and unavoidable impurities.

Description

technical field [0001] Embodiments of the present invention relate to a nickel (nickel)-based alloy welding material, a welding material for nuclear reactors, nuclear energy equipment and structures, and a repair method for nuclear energy equipment and structures. Background technique [0002] Conventionally, in boiling water nuclear reactor (BWR) plants (plants), it has been reported that stress corrosion cracking (SCC: Stress Corrosion Cracking) occurs in welded parts of reactor structures. Specifically, it is a phenomenon that SCC occurs when the SCC-sensitive 182 alloy containing 14% by mass to 17% by mass of Cr is used as a welding material. In addition, the 82 alloy is an alloy containing 18 mass % to 22 mass % of Cr, and is a material superior in SCC resistance compared with the 182 alloy, but damage cases have also been reported about the 82 alloy. [0003] 52 alloy, which is a 690-series alloy, is used as a welding material for a welding part of a pressurized water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30C22C19/05
CPCB23K35/304C22C19/053B23K9/00
Inventor 片山义纪河野涉小畑稔森岛康雄林贵广阿部由美子田中大辉
Owner KK TOSHIBA