[미국특허]
High strength high toughness Mo alloy worked material and method for production thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B22F-003/24
C23C-008/24
출원번호
US-0509158
(2003-03-27)
등록번호
US-7442225
(2008-10-28)
우선권정보
JP-2002-098015(2002-03-29)
국제출원번호
PCT/JP03/003913
(2003-03-27)
§371/§102 date
20050624
(20050624)
국제공개번호
WO03/083158
(2003-10-09)
발명자
/ 주소
Takada,Jun
Nagae,Masahiro
Nakanishi,Makoto
Takida,Tomohiro
Hoshika,Tetsushi
출원인 / 주소
Japan Science and Technology Agency
National University Corporation Okayama University
A.L.M.T. Corp.
대리인 / 주소
Westerman, Hattori, Daniels & Adrian, LLP.
인용정보
피인용 횟수 :
2인용 특허 :
6
초록▼
The present invention provides a worked molybdenum-alloy material that can be used at higher temperatures than at least temperatures at which known TZM alloys are used. A worked molybdenum-alloy material having high strength and high toughness includes at least one of carbide particles, oxide partic
The present invention provides a worked molybdenum-alloy material that can be used at higher temperatures than at least temperatures at which known TZM alloys are used. A worked molybdenum-alloy material having high strength and high toughness includes at least one of carbide particles, oxide particles, and boride particles and fine nitride particles dispersed by internal nitriding of an untreated worked molybdenum-alloy material in which a nitride-forming-metal element is dissolved to form a solid solution in a molybdenum matrix and at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed. The worked molybdenum-alloy material is manufactured by subjecting a worked alloy material, which has a matrix composed of molybdenum, in which at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed and in which at least one of titanium, zirconium, hafnium, vanadium, niobium, and tantalum is dissolved to form a solid solution, to multi-step internal nitriding treatment including a stepwise increase of the treatment temperature.
대표청구항▼
The invention claimed is: 1. A worked molybdenum-alloy material having high strength and high toughness, comprising: molybdenum matrix containing a nitride forming element dissolved therein forming a solid solution; at least one of carbide particles, oxide particles, and boride particles precipitat
The invention claimed is: 1. A worked molybdenum-alloy material having high strength and high toughness, comprising: molybdenum matrix containing a nitride forming element dissolved therein forming a solid solution; at least one of carbide particles, oxide particles, and boride particles precipitated and dispersed in said molybdenum matrix; and fine nitride particles dispersed in said molybdenum matrix, wherein said nitride particles are dispersed by internally nitriding a worked molybdenum-alloy material in which a nitride-forming-metal element is dissolved forming a solid solution in a molybdenum matrix and at least one of carbide particles, oxide particles, and boride particles is precipitated and dispersed, and wherein a worked crystal-grain structure or a recovered crystal-grain structure is maintained in both surface region and inner region of the worked molybdenum-alloy material, and the worked molybdenum-alloy material has a recrystallization temperature of 1800�� C. or higher. 2. A method for manufacturing a molybdenum-alloy material having high strength and high toughness, comprising the steps of: preparing a worked molybdenum-alloy material, comprising a molybdenum matrix, at least one of carbide particles, oxide particles, and boride particles precipitated and dispersed in said molybdenum matrix, and at least one of titanium, zirconium, hafnium, vanadium, niobium, and tantalum dissolved in said molybdenum matrix forming a solid solution; and subjecting said worked molybdenum-alloy material to a multi-step internal nitriding treatment including a stepwise increase of treatment temperature, the treatment temperature of each step being a temperature which does not cause recrystallization of said worked molybdenum-alloy material, wherein a worked crystal-grain structure or a recovered crystal-grain structure is maintained in both surface region and inner region of the worked molybdenum-alloy material, and the worked molybdenum-alloy material has a recrystallization temperature of 1800�� C. or higher.
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이 특허에 인용된 특허 (6)
Eck Ralf (Reutte ATX) Leichtfried Gerhard (Reutte ATX), Creep-resistant alloy of high-melting metal and process for producing the same.
Kononenko, Yuriy G.; Belousov, Igor V.; Bondarchuk, Vadim Ivanovich; Marynskyi, Andrii; Soderberg, Carl R., Method for limiting surface recrystallization.
Subramanian, Pazhayannur Ramanathan; Marte, Judson Sloan; Dupree, Paul Leonard, Nano particle-reinforced Mo alloys for x-ray targets and method to make.
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