IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0310040
(1994-09-22)
|
우선권정보 |
FR-0008760 (1992-07-09) |
발명자
/ 주소 |
- Charquet Daniel (Albertbille FRX)
|
출원인 / 주소 |
- Compagnie Europeenne Du Zirconium Cezus (Courbevoie FRX 03)
|
인용정보 |
피인용 횟수 :
9 인용 특허 :
0 |
초록
▼
A product having at least an exterior surface formed by a Zr alloy comprising the following addition elements (% by weight): Sn 0.40 to 1.70, Fe 0.05 to 0.25, Cr 0.03 to 0.16, Ni less than 0.08; the following maximum amounts of impurities (ppm): Al 75, B 0.5, Cd 0.5, C 270, Co 20, Cu 50, Hf 100, H2
A product having at least an exterior surface formed by a Zr alloy comprising the following addition elements (% by weight): Sn 0.40 to 1.70, Fe 0.05 to 0.25, Cr 0.03 to 0.16, Ni less than 0.08; the following maximum amounts of impurities (ppm): Al 75, B 0.5, Cd 0.5, C 270, Co 20, Cu 50, Hf 100, H2 25, Mg 20, Mn 50, Mo 50, N2 65, Si 120, Ti 50, W 10, U total 3.5; with the balance being O2 and Zr, wherein the Zr alloy has an Ni content which is greater than 70 ppm and less than 300 ppm.
대표청구항
▼
A method for manufacturing a Zr alloy product, comprising the steps of: a) preparing an ingot of a Zr alloy consisting essentially of, by weight, Sn 0.40 to 1.70%, Fe 0.05 to 0.25%, Cr 0.03 to 0.16%, and Ni 150 to 290 ppm, and the following maximum amounts of impurities: Al 75 ppm, B 0.5 ppm, Cd 0.5
A method for manufacturing a Zr alloy product, comprising the steps of: a) preparing an ingot of a Zr alloy consisting essentially of, by weight, Sn 0.40 to 1.70%, Fe 0.05 to 0.25%, Cr 0.03 to 0.16%, and Ni 150 to 290 ppm, and the following maximum amounts of impurities: Al 75 ppm, B 0.5 ppm, Cd 0.5 ppm, C 270 ppm, Co 20 ppm, Cu 50 ppm, Hf 100 ppm, H2 25 ppm, Mg 20 ppm, Mn 50 ppm, Mo 50 ppm, N2 65 ppm, Si 120 ppm, Ti 50 ppm, W 10 ppm, U total 3.5 ppm, and O2 1400 ppm, alloy balance Zr; b) hot shaping the ingot to form a blank; c) quenching the blank from the beta field; and d) transforming the quenched blank by a succession of thermomechanical and/or mechanical and heat treatments, the temperatures and times of said treatments being adjusted according to a time factor: A=Si exp(-40,000/Ti), in which ti and Ti are respectively, the times of treatment in hours, and the temperatures of treatment in °K, wherein time factor A including all said treatments is between 4×10-19 hours and 5×10-18 hours, and a partial time factor A′including all said treatments except a final treatment is less than 16×10-19, said Zr alloy product thereby having a weight gain D50 mg/dm2 in a standard nodular corrosion test after 24 hours at 500°C.
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