초록 ▼

The invention proposes a zirconium-based alloy also containing, by weight, apart from unavoidable impurities, from 0.02 to 1% of iron having from 0.8% to 2.3% of niobium, less than 2000 ppm of tin, less than 2000 ppm of oxygen, less than 100 ppm of carbon, from 5 to 35 ppm of sulphur and from 0.01%

The invention proposes a zirconium-based alloy also containing, by weight, apart from unavoidable impurities, from 0.02 to 1% of iron having from 0.8% to 2.3% of niobium, less than 2000 ppm of tin, less than 2000 ppm of oxygen, less than 100 ppm of carbon, from 5 to 35 ppm of sulphur and from 0.01% to 0.25% in total of chromium and/or vanadium, the ratio R of the niobium content, less 0.5%, to the iron content, optionally supplemented by the chromium and/or vanadium content.

대표청구항 ▼

1. A zirconium based alloy comprising:zirconium; and in addition to unavoidable impurities, by weight, from 0.02 to 1% iron; from 0.8% to 2.3% niobium, less than 2000 ppm tin, less than 2000 ppm oxygen, less than 100 ppm carbon, from 5 to 35 ppm sulfur and from 0.01% to 0.25% in total of at least on

1. A zirconium based alloy comprising:zirconium; and in addition to unavoidable impurities, by weight, from 0.02 to 1% iron; from 0.8% to 2.3% niobium, less than 2000 ppm tin, less than 2000 ppm oxygen, less than 100 ppm carbon, from 5 to 35 ppm sulfur and from 0.01% to 0.25% in total of at least one of chromium and vanadium, a ratio (Nb?0.5%)/(Fe+Cr+V) being higher than 2.5. 2. The alloy according to claim 1, wherein the oxygen is from 1000 to 1600 ppm.3. The alloy according to claim 1, wherein the niobium is from 1 to 1.8% by weight, the iron is from 0.1 to 0.3% by weight, the tin is from 0.15 to 0.20% by weight, the at least one of chromium and vanadium is from 0.01 to 0.1% by weight, the oxygen is from 1000 to 1600 ppm, the carbon is less than 100 ppm and the sulfur is from 5 to 35 ppm.4. A tube comprising:a tubular arranged zirconium-based alloy wherein the alloy comprises: zirconium; and in addition to unavoidable impurities, by weight, from 0.02 to 1% iron; from 0.8 to 2.3% niobium, less than 2000 ppm tin, less than 2000 ppm oxygen, less than 100 ppm carbon, from 5 to 35 ppm sulfur and from 0.01% to 0.25% in total of at least one of chromium and vanadium, a ratio of (Nb?0.5%)/(Fe+Cr+V) being higher than 2.5 in a recrystallized state. 5. A flat product comprising:a flat arranged zirconium based alloy wherein the alloy comprises: zirconium; and in addition to unavoidable impurities, by weight, from 0.02 to 1% iron; from 0.8% to 2.3% niobium, less than 2000 ppm tin, less than 2000 ppm oxygen, less than 100 ppm carbon, from 5 to 35 ppm sulfur and from 0.01% to 0.25% in total of at least one of chromium and vanadium, a ratio (Nb?0.5%)/(Fe+Cr+V) being higher than 2.5 in a recrystallized state. 6. A method of using a component comprising:providing the component made of an alloy comprising: zirconium; and in addition to unavoidable impurities, by weight, from 0.02 to 1% iron; from 0.8% to 2.3% niobium, less than 2000 ppm tin, less than 2000 ppm oxygen, less than 100 ppm carbon, from 5 to 35 ppm sulfur and from 0.01% to 0.25% in total of at least one of chromium and vanadium, a ratio of (Nb?0.5%)/(Fe+Cr+V) being higher than 2.5 in a recrystallized state; and utilizing the component in a pressurized water reactor, wherein water initially contains less than 3.5 ppm of lithium. 7. The alloy according to claim 1, wherein the ratio is higher than 3.8. The alloy according to claim 1, wherein the iron content does not exceed 0.35%.9. A method for making a tube to constitute at least one of all and an external portion of at least one of nuclear fuel rod cladding and a guide tube for a nuclear fuel assembly comprising:producing a bar from a zirconium-based alloy also containing by weight apart from unavoidable impurities, by weight, from 0.02 to 1% iron; from 0.8% to 2.3% niobium, less than 2000 ppm tin, less than 2000 ppm oxygen, less than 100 ppm carbon, from 5 to 35 ppm sulfur and from 0.01% to 0.25% in total of at least one of chromium and vanadium, a ratio (Nb?0.5%)/(Fe+Cr+V) being higher than 2.5; water-quenching the bar after heating at from 1000° C. to 1200° C.; extruding a blank after heating at from 600° C. to 800° C.; cold rolling the blank in at least two passes to obtain a tube, with intermediate thermal treatments at from 560 C to 620 C; and carrying out a final thermal treatment at from 560 C to 620 C, all of the thermal treatments being carried out in at least one of an inert atmosphere and under vacuum.