Title:
耐食耐摩耗盛金の形成方法および耐食耐摩耗弁の製造方法
Document Type and Number:
Japanese Patent JP6960329
Kind Code:
B2
Abstract:
The invention is intended to improve the corrosion resistance of an overlay used in a severe environment such as 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 using laser lamination modeling, and is configured from a plurality of metal layers 1a, 1b, 1c, and 1d of a Co-base alloy. The size (thickness) of carbide eutectics that precipitate in the metal layers la, 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 appropriately 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.
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Inventors:
Hirano Sei
Yoshihisa Kiyotoki
Miyata Hajime
Keiji Kawanaka
Shinji Matsushita
Hiroshi Shiratori
Yoshihisa Kiyotoki
Miyata Hajime
Keiji Kawanaka
Shinji Matsushita
Hiroshi Shiratori
Application Number:
JP2017250255A
Publication Date:
November 05, 2021
Filing Date:
December 26, 2017
Export Citation:
Assignee:
Hitachi ge Nuclear Energy Co., Ltd.
International Classes:
G21D1/00; B22F3/105; B22F3/16; B23K26/21; B23K26/34; C23C26/00; F16K1/42; F16K3/00
Domestic Patent References:
| JP2011214682A | ||||
| JP2001281394A | ||||
| JP2014034998A | ||||
| JP2005290529A | ||||
| JP2001079663A |
Foreign References:
| US20130149552 | ||||
| WO2011068155A3 |
Other References:
R.Jendrzejewski et al,Temperature distribution in laser-clad multi-layers,Materials Science and Engineering A,379,ELSEVIER,2004年,313-320
Ana Sofia C.M D'Oliveira et al,Microstructural features of consecutive layers of Stellite 6 deposited by laser cladding,Surface and Coatings Technology,ELSEVIER,2002年,153,203-209
Ana Sofia C.M D'Oliveira et al,Microstructural features of consecutive layers of Stellite 6 deposited by laser cladding,Surface and Coatings Technology,ELSEVIER,2002年,153,203-209
Attorney, Agent or Firm:
Isono International Patent and Trademark Office
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