Method of producing cold-worked centrifugal cast tubular products
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-022/16
B21D-017/02
출원번호
US-0856336
(2010-08-13)
등록번호
US-8479549
(2013-07-09)
발명자
/ 주소
Fonte, Matthew V.
출원인 / 주소
Dynamic Flowform Corp.
대리인 / 주소
Sunstein Kann Murphy & Timbers LLP
인용정보
피인용 횟수 :
12인용 특허 :
18
초록▼
A method of producing a seamless, tubular product includes centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter. The method then removes material from the inner diameter of the workpiece and subjects the workpiece to at least about
A method of producing a seamless, tubular product includes centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter. The method then removes material from the inner diameter of the workpiece and subjects the workpiece to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process. The metal forming process includes radial forging, rolling, pilgering, and/or flowforming.
대표청구항▼
1. A method of producing a seamless, tubular product, the method comprising: centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter;removing material from the inner diameter of the workpiece; andsubjecting the workpiece to at least a
1. A method of producing a seamless, tubular product, the method comprising: centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter;removing material from the inner diameter of the workpiece; andsubjecting the workpiece to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process, the metal forming process comprising radial forging, rolling, pilgering, flowforming, or a combination thereof. 2. The method of claim 1, wherein the wall reduction is at least about 35%. 3. The method of claim 2, wherein the at least about 35% wall reduction includes at least two reductions, wherein the first reduction is at least about a 25% wall reduction. 4. The method of claim 1, wherein the wall reduction is at least about 50%. 5. The method of claim 4, wherein the at least about 50% wall reduction includes at least two reductions, wherein the first reduction is at least about a 25% wall reduction. 6. The method of claim 1, wherein the corrosion resistant alloy includes a stainless steel alloy, a titanium-based alloy, a nickel-based alloy, a cobalt-based alloy or a zirconium-based alloy. 7. The method of claim 1, further comprising removing material from the outer diameter of the workpiece before subjecting the workpiece to the wall reduction. 8. The method of claim 1, further comprising annealing the workpiece after subjecting the workpiece to the wall reduction. 9. The method of claim 8, further comprising subjecting the workpiece to at least about a 10% wall reduction after annealing the workpiece. 10. The method of claim 1, wherein the metal forming process is radial forging. 11. The method of claim 1, wherein the metal forming process is rolling. 12. The method of claim 1, wherein the metal forming process is pilgering. 13. The method of claim 1, wherein the metal forming process is flowforming. 14. The method of claim 1, further comprising annealing, age hardening, and then annealing the workpiece before subjecting the workpiece to the wall reduction. 15. The method of claim 1, further comprising forming a rifling on an inner diameter of the workpiece. 16. The method of claim 1, wherein the metal forming process comprises: providing at least two rollers having a displacement from one another in an axial direction with respect to the workpiece; andcompressing the outer diameter of the workpiece with the rollers at a temperature below the 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. 17. A tubular component produced according to the method of claim 1.
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이 특허에 인용된 특허 (18)
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Nadkarni Anil V. (Mentor OH) Samal Prasanna K. (Lyndhurst OH) Wang James C. (Mentor OH) Sunk James E. (Philadelphia PA), Method of making dispersion strengthened metal bodies and product.
Adamson Ronald B. (Fremont CA) Lutz Daniel R. (San Jose CA) Armijo Joseph S. (Saratoga CA), Method of preparing fuel cladding having an alloyed zirconium barrier layer.
Sabol George P. (Murrysville Boro PA) Barry Robert F. (Monroeville PA), Process for forming seamless tubing of zirconium or titanium alloys from welded precursors.
Cook Charles S. (Murrysville Boro PA) Sabol George P. (Murrysville PA), Texture enhancement of metallic tubing material having a hexagonal close-packed crystal structure.
Branagan, Daniel James; Cheng, Sheng; Ma, Longzhou; Walleser, Jason K.; Justice, Grant G.; Ball, Andrew T.; Clark, Kurtis; Larish, Scott; Peterson, Alissa; Mack, Patrick E.; Merkle, Brian D.; Meacham, Brian D.; Sergueeva, Alla V., Classes of steels for tubular products.
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