System and method of producing autofrettage in tubular components using a flowforming process
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C21D-008/10
F41C-027/00
출원번호
US-0023189
(2011-02-08)
등록번호
US-8910409
(2014-12-16)
발명자
/ 주소
Fonte, Matthew V.
출원인 / 주소
ATI Properties, Inc.
대리인 / 주소
Grosselin, III, John E.
인용정보
피인용 횟수 :
4인용 특허 :
45
초록▼
A method of producing autofrettage in a tubular component provides a tubular workpiece having an inner diameter and an outer diameter and provides at least two rollers having a displacement from one another in an axial direction with respect to the workpiece. The method places the workpiece on a man
A method of producing autofrettage in a tubular component provides a tubular workpiece having an inner diameter and an outer diameter and provides at least two rollers having a displacement from one another in an axial direction with respect to the workpiece. The method places the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel. The method also compresses the outer diameter of the workpiece with the rollers at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress to the inner diameter of the workpiece.
대표청구항▼
1. A method of producing autofrettage in a tubular component, the method comprising: providing a tubular workpiece having an inner diameter and an outer diameter, wherein the workpiece includes at least one of a nickel-based superalloy, a cobalt-based superalloy, and an iron-based superalloy;providi
1. A method of producing autofrettage in a tubular component, the method comprising: providing a tubular workpiece having an inner diameter and an outer diameter, wherein the workpiece includes at least one of a nickel-based superalloy, a cobalt-based superalloy, and an iron-based superalloy;providing at least two rollers having a displacement from one another in an axial direction with respect to the workpiece;placing the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel; andcompressing the outer diameter of the workpiece with the rollers at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress of at least 500 MPa to the inner diameter of the workpiece. 2. The method of claim 1, further comprising subjecting the workpiece to a precipitation hardening heat treatment after compressing the workpiece. 3. The method of claim 1, wherein the tubular workpiece is produced by rotary forging, radial forging, rotary swaging, or a combination thereof. 4. The method of claim 1, wherein the mandrel further imparts a rifling to the inner diameter of the workpiece. 5. A tubular component produced according to the method of claim 1. 6. A method of producing a superalloy tubular component, the method comprising: providing a tubular workpiece having an inner diameter and an outer diameter, the workpiece made of a superalloy material comprising at least one of a nickel-based superalloy, a cobalt-based superalloy, and an iron-based superalloy;placing the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel; andcompressing the outer diameter of the workpiece at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress of at least 500 MPa to the inner diameter of the workpiece. 7. The method of claim 6, further comprising subjecting the workpiece to a precipitation hardening heat treatment after compressing the workpiece. 8. The method of claim 6, wherein the tubular workpiece is produced by rotary forging, radial forging, rotary swaging, or a combination thereof. 9. The method of claim 6, wherein the mandrel further imparts a rifling to the inner diameter of the workpiece. 10. A tubular component produced according to the method of claim 6. 11. A method of producing a superalloy gun barrel, the method comprising: providing a tubular workpiece having an inner diameter and an outer diameter, wherein the inner diameter is about one inch or less and the workpiece is made of a superalloy material comprising at least one of a nickel-based superalloy, a cobalt-based superalloy, and an iron-based superalloy;placing the workpiece on a mandrel such that the inner diameter is adjacent to the mandrel; andcompressing the outer diameter of the workpiece at a temperature below a recrystallization temperature of the workpiece using a combination of axial and radial forces so that the mandrel contacts the inner diameter and imparts a compressive hoop stress of at least 500 MPa to the inner diameter of the workpiece. 12. The method of claim 11, further comprising subjecting the workpiece to a precipitation hardening heat treatment after compressing the workpiece. 13. The method of claim 11, wherein the tubular workpiece is produced by rotary forging, radial forging, rotary swaging, or a combination thereof. 14. The method of claim 11, wherein the mandrel further imparts a rifling to the inner diameter of the workpiece. 15. The method of claim 11, wherein compressing the outer diameter is done by a flowforming process, a rotary forging process, a rotary swaging process, or a combination thereof. 16. A superalloy gun barrel produced according to the method of claim 11. 17. A superalloy liner produced according to the method of claim 11, the liner to be used within an inner diameter of a gun barrel.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (45)
Jones, John; Yardley, Michael J.; Barker, Terry K, Alloy pipes and methods of making same.
Stein Bernd,DEX ; Lehnert Heinz,DEX ; Zimmermann Wilhelm,DEX ; Steinhauer Heinz,DEX, Method and device for producing press-rolled pipes with inner wall thickenings at the ends.
Ray Ranjan (Waltham MA) Polk Donald E. (Washington DC) Giessen Bill C. (Cambridge MA), Nickel base superalloys which contain boron and have been processed by a rapid solidification process.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.