公开(公告)号：US20190193195A1

公开(公告)日：2019-06-27

申请号：US16228923

申请日：2018-12-21

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Sei HIRANO ,  Yoshihisa KIYOTOKI ,  Hajime MIYATA ,  Hirotsugu KAWANAKA ,  Shinji MATSUSHITA ,  Hiroshi SHIRATORI

IPC分类号： B23K20/12 ,  C22F1/10 ,  F16K15/02 ,  F16K25/00 ,  F16K3/12 ,  G21D1/02

CPC分类号： B23K20/1275 ,  B22F3/115 ,  B22F2007/042 ,  B22F2999/00 ,  B23K26/342 ,  B23K2101/34 ,  B23K2103/05 ,  B23K2103/26 ,  B23P15/001 ,  C21D2251/04 ,  C21D2261/00 ,  C22C1/0425 ,  C22C19/07 ,  C22F1/10 ,  C23C24/10 ,  C23C24/106 ,  C23C28/021 ,  F01L3/02 ,  F01L3/08 ,  F01L2101/00 ,  F16K3/0263 ,  F16K3/12 ,  F16K15/021 ,  F16K25/00 ,  F16K25/005 ,  G21C17/0225 ,  G21D1/02 ,  B22F2207/13

摘要： The present invention is intended is to improve the corrosion resistance of an overlay used in a nuclear power plant, and to reduce dissolution of cobalt from an overlay. The corrosion and wear resistant overlay is formed along a surface of a base by laser lamination modeling, and is configured from a plurality of metal layers of a Co-base alloy. The thickness of carbide eutectics that precipitate in the metal layers is the largest in the metal layer closest to the base, and is gradually smaller in the metal layers farther away from the base. The intensity of the laser beam applied to form layers by laser lamination modeling is adjusted so that the carbide eutectics that precipitate in at least the outermost metal layer have a controlled size of 10 μm or less.

公开(公告)号：US20240200679A1

公开(公告)日：2024-06-20

申请号：US18588722

申请日：2024-02-27

申请人： HITACHI-GE NUCLEAR ENERGY, LTD.

发明人： Hirotsugu KAWANAKA ,  Yoshihisa KIYOTOKI ,  Sei HIRANO ,  Daisuke HIRASAWA ,  Junya KANEDA

IPC分类号： F16K25/04 ,  B22F10/28 ,  B22F10/64 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y80/00 ,  C22C19/07 ,  C22F1/10 ,  F16K3/30

CPC分类号： F16K25/04 ,  B22F10/64 ,  B33Y40/20 ,  B33Y80/00 ,  C22C19/07 ,  C22F1/10 ,  B22F10/28 ,  B22F2301/15 ,  B33Y10/00 ,  F16K3/30

摘要： To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.

公开(公告)号：US20220025984A1

公开(公告)日：2022-01-27

申请号：US17311726

申请日：2019-11-06

申请人： HITACHI-GE NUCLEAR ENERGY, LTD.

发明人： Hirotsugu KAWANAKA ,  Yoshihisa KIYOTOKI ,  Sei HIRANO ,  Daisuke HIRASAWA ,  Junya KANEDA

IPC分类号： F16K25/04 ,  B33Y40/20 ,  B22F10/64 ,  C22C19/07 ,  C22F1/10 ,  B33Y80/00

摘要： To provide a fluid contact member whose corrosion resistance is particularly further improved than that in the related art. In order to solve this problem, a fluid contact member 10 includes a fluid contact portion 1 configured to be in contact with a fluid, the fluid contact portion 1 has a cobalt-based alloy phase 2 having a dendrite, and a compound phase 3 formed in an arm space of the dendrite and containing chromium carbide, and among a plurality of secondary arms 5 extending from one primary arm 4 constituting the dendrite, an average interval between adjacent secondary arms 5 is 5 μm or less. At this time, the average interval is preferably 3 μm or less. Further, the compound phase 3 is preferably formed discontinuously in the dendrite arm space.

公开(公告)号：US20210323085A1

公开(公告)日：2021-10-21

申请号：US17363826

申请日：2021-06-30

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Sei HIRANO ,  Yoshihisa KIYOTOKI ,  Hajime MIYATA ,  Hirotsugu KAWANAKA ,  Shinji MATSUSHITA ,  Hiroshi SHIRATORI

IPC分类号： B23K20/12 ,  C22F1/10 ,  F16K15/02 ,  F16K25/00 ,  F16K3/12 ,  G21D1/02 ,  F16K3/02 ,  C22C1/04 ,  C23C24/10 ,  B22F3/115 ,  C22C19/07 ,  F01L3/02 ,  G21C17/022 ,  C23C28/02 ,  F01L3/08 ,  B23K26/342

摘要： Intended is to improve the corrosion resistance of an overlay used in a nuclear power plant, and to reduce dissolution of cobalt from an overlay. The corrosion and wear resistant overlay 7 is formed along a surface of a base 2 by laser lamination modeling, and is configured from a plurality of metal layers 1a, 1b, 1c, and 1d of a Co-base alloy. The thickness of carbide eutectics that precipitate in the metal layers 1a, 1b, 1c, and 1d is the largest in the metal layer 1a closest to the base 2, and is gradually smaller in the metal layers 1b, 1c, and 1d farther away from the base 2. The intensity of the laser beam applied to form layers by laser lamination modeling is adjusted so that the carbide eutectics that precipitate in at least the outermost metal layer 1d have a controlled size of 10 μm or less.