LEGIERUNG UND ROHR ZUM ASSEMBLIEREN VON KERNBRENNSTOFF UND VERFAHREN ZUR HERSTELLUNG EINES SOLCHEN ROHRES

LEGIERUNG UND ROHR ZUM ASSEMBLIEREN VON KERNBRENNSTOFF UND VERFAHREN ZUR HERSTELLUNG EINES SOLCHEN ROHRES

The invention concerns a method for making tubes designed for a nuclear fuel pencil case or guide tube which consists in forming a bar in a zirconium based alloy containing equally 0.3 to 0.25 wt. % of the total iron, of chromium or vanadium, 0.8 to 1.3 wt. % of niobium, less than 2000 ppm of tin, 5...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SENEVAT, JEAN, CHARQUET, DANIEL, MARDON, JEAN-PAUL
Format: Patent
Sprache:ger
Schlagworte:
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:The invention concerns a method for making tubes designed for a nuclear fuel pencil case or guide tube which consists in forming a bar in a zirconium based alloy containing equally 0.3 to 0.25 wt. % of the total iron, of chromium or vanadium, 0.8 to 1.3 wt. % of niobium, less than 2000 ppm of tin, 500 to 2000 ppm of oxygen, less than 100 ppm of carbon, 5 to 30 ppm of sulphur and less than 50 ppm of silicon. The bar is soaked in water after being heated at a temperature between 1000 DEG C and 1200 DEG C. A blank is spun after being heated at a temperature between 600 DEG C and 800 DEG C. The blank is cold-rolled, in at least three of four passes, to obtain a tube with intermediate heat treatments between 560 DEG C and 620 DEG C and s final heat treatment is carried out between 560 DEG C and 620 DEG C in inert atmosphere or under vacuum.