EP 0673691 A1 19950927 - Method of production of a Zircalloy-2 tubular blank internally clad with zirconium, adapted for ultrasonic measurement of the thickness of zirconium.
Title (en)
Method of production of a Zircalloy-2 tubular blank internally clad with zirconium, adapted for ultrasonic measurement of the thickness of zirconium.
Title (de)
Verfahren zum Herstellen eines mit Zirkonium innenbeschichteten rohrförmigen Rohlings aus Zircalloy-2, geeignet zum Ultraschallmessen der Dicke des Zirkoniums.
Title (fr)
Procédé de fabrication d'une ébauche tubulaire en zircaloy 2 plaquée intérieurement en zirconium et apte au contrÔlé ultrasonore de l'épaisseur de zirconium.
Publication
Application
Priority
FR 9403724 A 19940324
Abstract (en)
A tubing comprising a zircalloy 2 casing with an internal zirconium coating is produced by water quenching a worked zircalloy 2 bar from the beta range before or after cutting into billets which may be pierced or not followed by a possible anneal. Water quenching a worked non-alloy zirconium billet containing 250-1000 ppm Fe, before or after piercing from 880-1050 degrees C followed by extruding in the alpha range. The zirconium tube is positioned inside the zircalloy billet and the assembly extruded in the alpha range followed by cold rolling and heat treatment. The complete thermomechanical treatment is such that the size of the gains in the zircalloy and zirconium layers is respectively 9-12 and 6-10 ASTM with at least is difference of 2 ASTM being present.
Abstract (fr)
L'invention concerne un procédé de fabrication d'une ébauche tubulaire en zircaloy 2 plaquée intérieurement en zirconium et destinée à l'élaboration de tubes-gaines composites pour combustible nucléaire. Le placage intérieur en zirconium est rendu apte au contrôle ultrasonore d'épaisseur par un traitement thermomécanique approprié intervenant à une ou à plusieurs étapes d'élaboration de ladite ébauche et dont le but est de régler la taille de grain selon l'indice ASTM entre 9 et 12 sur le ziraloy 2 et entre 6 et 10 sur le zirconium non allié en conservant une différence de taille de grain entre le zircaloy 2 et le zirconium non allié d'au moins 2 indices ASTM. <IMAGE>
IPC 1-7
IPC 8 full level
G21C 3/20 (2006.01); B21C 37/06 (2006.01); C22F 1/00 (2006.01); C22F 1/18 (2006.01); G21C 3/06 (2006.01)
CPC (source: EP US)
B21C 37/06 (2013.01 - EP US); C22F 1/186 (2013.01 - EP US)
Citation (search report)
- [DA] FR 2579122 A1 19860926 - CEZUS CO EUROP ZIRCONIUM [FR]
- [A] EP 0574194 A1 19931215 - GEN ELECTRIC [US]
- [A] DE 2951102 A1 19800626 - GEN ELECTRIC
- [A] FR 2585593 A1 19870206 - WESTINGHOUSE ELECTRIC CORP [US]
Designated contracting state (EPC)
DE SE
DOCDB simple family (publication)
EP 0673691 A1 19950927; EP 0673691 B1 19970813; DE 69500537 D1 19970918; DE 69500537 T2 19980205; FR 2717717 A1 19950929; FR 2717717 B1 19960515; JP 2923224 B2 19990726; JP H07306279 A 19951121; US 5609697 A 19970311
DOCDB simple family (application)
EP 95420069 A 19950320; DE 69500537 T 19950320; FR 9403724 A 19940324; JP 6606495 A 19950324; US 39955595 A 19950307