Methods of brazing wide gaps in nickel base superalloys without substantial degradation of properties
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B23K-001/00
B23K-035/30
C22C-019/05
출원번호
US-0098389
(2016-04-14)
등록번호
US-9839980
(2017-12-12)
발명자
/ 주소
Bruck, Gerald J.
출원인 / 주소
SIEMENS ENERGY, INC.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
Nickel base superalloys, including in some embodiments 5% to 7% Fe, which were previously developed and used for their corrosion resistance, also possess favorable characteristics for use as a braze filler in repair or joining of superalloy substrates, such as those used to form turbine engine blade
Nickel base superalloys, including in some embodiments 5% to 7% Fe, which were previously developed and used for their corrosion resistance, also possess favorable characteristics for use as a braze filler in repair or joining of superalloy substrates, such as those used to form turbine engine blades and vanes, heat exchangers, vessels, and piping. In particular, such corrosion-resistant nickel base superalloys have favorable characteristics for wide-gap brazing of gaps greater than one millimeter in superalloy substrates that preserves favorable material properties throughout the braze region in the substrate.
대표청구항▼
1. A method of brazing a gap in a Ni base superalloy substrate consisting essentially of: providing a braze alloy having substantially the following composition in weight percent: Cr: 20%-22%; and,Fe: 5%-7%; and,Si: 5%-10%; and,Mo: 1.5%-10%; and,Cu: 0.2%-2%; and,C: 0%-0.03%; and, optionally, one or
1. A method of brazing a gap in a Ni base superalloy substrate consisting essentially of: providing a braze alloy having substantially the following composition in weight percent: Cr: 20%-22%; and,Fe: 5%-7%; and,Si: 5%-10%; and,Mo: 1.5%-10%; and,Cu: 0.2%-2%; and,C: 0%-0.03%; and, optionally, one or more of;Al: greater than 0% and less than approximately 3%; and,Ti: greater than 0% and less than approximately 7%; and,Hf: greater than 0% and less than approximately 1.5%; and,Nb: greater than 0% and less than approximately 1%; and,Zr: greater than 0% and less than approximately 6%; and,B: greater than 0% and less than approximately 1%; and,the balance of the braze alloy is Ni; and,delivering the braze alloy to a gap in the substrate, wherein the gap is too wide for diffusion brazing; andbrazing the gap having the braze alloy therein at a temperature that is the lower of 1180 degrees Celsius or a temperature that is above liquidus temperature of the braze alloy but below solidus temperature of the substrate; and,allowing the braze alloy to solidify creating thereby a braze zone. 2. A method of brazing a gap in a Ni base superalloy substrate as in claim 1 wherein the braze alloy has substantially the following composition in weight percent: Cr: 20%; and,Fe: 6%; and,Si: 5%; and,Mo: 2.5%; and,Cu: 2%; and,C: 0%-0.03%; and,the balance of the braze alloy is Ni. 3. A method of brazing a gap in a Ni base superalloy substrate as in claim 1 wherein the gap having brazing alloy therein is at least 1 millimeter wide in some portion of the brazing zone. 4. A method of brazing a gap in a Ni base superalloy substrate as in claim 2 wherein the gap having brazing alloy therein is at least 1 millimeter wide in some portion of the brazing zone. 5. A method of brazing a gap in a Ni base superalloy substrate as in claim 3 wherein at least one of the following properties of the braze zone is at least 70% of the corresponding property of the Ni base superalloy: ultimate tensile strength, yield strength, elongation or corrosion resistance. 6. A method of brazing a gap in a Ni base superalloy substrate as in claim 4 wherein at least one of the following properties of the braze zone is at least 70% of the corresponding property of the Ni base superalloy: ultimate tensile strength, yield strength, elongation or corrosion resistance.
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이 특허에 인용된 특허 (4)
Jiang,Liang; Cretegny,Laurent; Miglietti,Warren M., Braze alloy compositions.
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