The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 2025
Filed:
Jun. 30, 2021
Hitachi-ge Nuclear Energy, Ltd., Hitachi, JP;
Sei Hirano, Ibaraki, JP;
Yoshihisa Kiyotoki, Ibaraki, JP;
Hajime Miyata, Ibaraki, JP;
Hirotsugu Kawanaka, Tokyo, JP;
Shinji Matsushita, Tokyo, JP;
Hiroshi Shiratori, Tokyo, JP;
Hitachi-GE Nuclear Energy, Ltd., Hitachi, JP;
Abstract
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 overlayis formed along a surface of a baseby laser lamination modeling, and is configured from a plurality of metal layers, andof a Co-base alloy. The thickness of carbide eutectics that precipitate in the metal layers, andis the largest in the metal layerclosest to the base, and is gradually smaller in the metal layers, andfarther 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 layerhave a controlled size of 10 μm or less.