IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0150494
(2011-06-01)
|
등록번호 |
US-8652400
(2014-02-18)
|
발명자
/ 주소 |
- Forbes Jones, Robin M.
- Rock, Christopher D.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
126 |
초록
▼
A thermo-mechanical treatment process is disclosed. A nickel-base alloy workpiece is heated in a first heating step to a temperature greater than the M23C6 carbide solvus temperature of the nickel-base alloy. The nickel-base alloy workpiece is worked in a first working step to a reduction in area of
A thermo-mechanical treatment process is disclosed. A nickel-base alloy workpiece is heated in a first heating step to a temperature greater than the M23C6 carbide solvus temperature of the nickel-base alloy. The nickel-base alloy workpiece is worked in a first working step to a reduction in area of 20% to 70%. The nickel-base alloy workpiece is at a temperature greater than the M23C6 carbide solvus temperature when the first working step begins. The nickel-base alloy workpiece is heated in a second working step to a temperature greater than 1700° F. (926° C.) and less than the M23C6 carbide solvus temperature of the nickel-base alloy. The nickel-base alloy workpiece is not permitted to cool to ambient temperature between completion of the first working step and the beginning of the second heating step. The nickel-base alloy workpiece is worked to a second reduction in area of 20% to 70%. The nickel-base alloy workpiece is at a temperature greater than 1700° F. (926° C.) and less than the M23C6 carbide solvus temperature of the nickel-base alloy when the second working step begins.
대표청구항
▼
1. A process comprising: a first heating step comprising heating a nickel-base alloy workpiece to a temperature in the range of 2000° F. to 2125° F.;a first forging step comprising rotary forging the heated nickel-base alloy workpiece to a reduction in area of 30% to 70%, wherein the nickel-base all
1. A process comprising: a first heating step comprising heating a nickel-base alloy workpiece to a temperature in the range of 2000° F. to 2125° F.;a first forging step comprising rotary forging the heated nickel-base alloy workpiece to a reduction in area of 30% to 70%, wherein the nickel-base alloy workpiece is at a temperature in the range of 2000° F. to 2125° F. when the first forging step begins;a second heating step comprising heating the rotary-forged nickel-base alloy workpiece to a temperature in the range of 1750° F. to 1925° F., wherein the rotary-forged nickel-base alloy workpiece is maintained at elevated temperature and not permitted to cool to ambient temperature between completion of the first forging step and beginning of the second heating step; anda second forging step comprising rotary forging the heated nickel-base alloy workpiece to a reduction in area of 20% to 70%, wherein the nickel-base alloy workpiece is at a temperature in the range of 1750° F. to 1925° F. when the second forging step begins;wherein the nickel-base alloy workpiece comprises, by weight, up to 0.05% carbon, 27.0% to 31.0% chromium, up to 0.5% copper, 7.0% to 11.0% iron, up to 0.5% manganese, up to 0.015% sulfur, up to 0.5% silicon, at least 58% nickel, and incidental impurities. 2. The process of claim 1, wherein the first heating step comprises heating the nickel-base alloy workpiece in a furnace operating at 2000° F. to 2125° F. for at least 6.0 hours time-at-temperature. 3. The process of claim 1, wherein the second heating step comprises heating the rotary-forged nickel-base alloy workpiece in a furnace operating at 1750° F. to 1925° F. for greater than 2.0 hours furnace time. 4. The process of claim 1, wherein the second heating step comprises heating the rotary-forged nickel-base alloy workpiece in a furnace operating at 1750° F. to 1925° F. for 3.0 hours to 10.0 hours furnace time. 5. The process of claim 1, wherein the second heating step comprises heating the rotary-forged nickel-base alloy workpiece in a furnace operating at 1750° F. to 1925° F. for 4.0 hours to 8.0 hours furnace time. 6. The process of claim 1, further comprising: vacuum induction melting feed materials to form a nickel-base alloy ingot;remelting the nickel-base alloy ingot to form a refined nickel-base alloy ingot, wherein the remelting comprises at least one remelting operation selected from the group consisting of vacuum arc remelting and electroslag remelting; andpress forging the refined nickel-base alloy ingot to form the nickel-base alloy workpiece. 7. The process of claim 1, further comprising, after the two heating steps and the two forging steps: heating the nickel-base alloy workpiece at a temperature of at least 1800° F., but no greater than a M23C6 carbide solvus temperature of the nickel-base alloy, for at least 3.0 hours time-at-temperature; andwater quenching the workpiece. 8. The process of claim 1, further comprising, after the two heating steps and the two forging steps: aging the nickel-base workpiece at a temperature of 1300° F. to 1400° F. for at least 3.0 hours time-at-temperature; andair cooling the workpiece. 9. A process comprising: a first heating step comprising heating a nickel-base alloy workpiece to a temperature greater than a M23C6 carbide solvus temperature of the nickel-base alloy;a first working step comprising working the heated nickel-base alloy workpiece to a reduction in area of 20% to 70%, wherein the nickel-base alloy workpiece is at a temperature greater than a M23C6 carbide solvus temperature when the first working step begins;a second heating step comprising heating the worked nickel-base alloy workpiece to a temperature greater than 1700° F. and less than the M23C6 carbide solvus temperature of the nickel-base alloy, wherein the as-worked nickel-base alloy workpiece is maintained at elevated temperature and not permitted to cool to ambient temperature between completion of the first working step and beginning of the second heating step; anda second working step comprising working the heated nickel-base alloy workpiece to a second reduction in area of 20% to 70%, wherein the nickel-base alloy workpiece is at a temperature greater than 1700° F. and less than the M23C6 carbide solvus temperature of the nickel-base alloy when the second working step begins;wherein the nickel-base alloy workpiece comprises, by weight, up to 0.05% carbon, 27.0% to 31.0% chromium, up to 0.5% copper, 7.0% to 11.0% iron, up to 0.5% manganese, up to 0.015% sulfur, up to 0.5% silicon, at least 58% nickel, and incidental impurities. 10. The process of claim 9, wherein the nickel-base alloy workpiece comprises, by weight, up to 0.05% carbon; 28.0% to 30.0% chromium; up to 0.25% copper; 8.0% to 10.0% iron; up to 0.25% manganese; up to 0.010% sulfur; up to 0.25% silicon; at least 58% nickel; and incidental impurities. 11. The process of claim 9, wherein the first working step and the second working step independently comprise at least one operation selected from the group consisting of flat rolling, ring rolling, roll forming, press forging, extruding, and rotary forging. 12. The process of claim 9, wherein the first working step and the second working step comprise rotary forging. 13. The process of claim 9, wherein the first heating step comprises heating the nickel-base alloy workpiece in a furnace operating at 2000° F. to 2125° F. for at least 3.0 hours time-at-temperature. 14. The process of claim 9, wherein second heating step comprises heating the nickel-base alloy workpiece in a furnace operating at 1750° F. to 1925° F. for greater than 2.0 hours furnace time. 15. The process of claim 9, wherein the second heating step comprises heating the nickel-base alloy workpiece in a furnace operating at 1750° F. to 1925° F. for 3.0 hours to 10.0 hours furnace time. 16. The process of claim 9, wherein the second heating step comprises heating the rotary-forged nickel-base alloy workpiece in a furnace operating at 1750° F. to 1925° F. for 4.0 hours to 8.0 hours furnace time. 17. The process of claim 9, further comprising: vacuum induction melting feed materials to form a nickel-base alloy ingot;remelting the nickel-base alloy ingot to form a refined nickel-base alloy ingot, wherein the remelting comprises at least one remelting operation selected from the group consisting of vacuum arc remelting and electroslag remelting; andpress forging the refined nickel-base alloy ingot to form the nickel-base alloy workpiece. 18. The process of claim 9, further comprising, after the two heating steps and the two working steps: heating the nickel-base alloy workpiece at a temperature of at least 1800° F., but no greater than a M23C6 carbide solvus temperature of the nickel-base alloy, for at least 3.0 hours time-at-temperature; andwater quenching the workpiece. 19. The process of claim 9, further comprising, after the two heating steps and the two forging steps: aging the nickel-base alloy workpiece at a temperature of 1300° F. to 1400° F. for at least 3.0 hours time-at-temperature; andair cooling the workpiece to ambient temperature.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.