Compagnie Europeenne Du Zirconium Cezus

Compagnie Europeene Du Zirconium Cezus

Cezus-compagnie Europeenne Du Zirconium

Gerard Bunel

Daniel Charquet

Pierre Barberis

Gerard Dumas

Max Dombre

Jean-Pierre Gros

Charles Chauvel-Trepier

A process for the fabrication of zirconium alloy sheet specifically intended for the manufacture of structural elements for boiling water reactors, which includes the following steps:

Process for the production of zirconium alloy sheet metal having good

A process for the manufacture of a sheet, band or strip of zirconium alloy or hafnium alloy, comprising hot roughing of an ingot into a blank, then hot rolling of this blank in the alpha domain, this hot rolling including several passes which follow one or more reheatings in a furnace at one or more temperatures (TR), each of which improves the formability of this blank, then cold rolling which consists of one or more cycles of rolling pinch passing/heat treatment. The hot rolling pass following the last furnace reheating is followed by reheating of the hot rolled blank by at least 100.degree. C. at more than 4.degree. C./s by infrared heating means with a wavelength between 0.8 and 5 micrometers. The hot rolling is then continued until the thickness at the end of the hot rolling is less than or equal to 0.8 times the thickness of the hot rolled blank. The product obtained is used for the manufacture of zirconium or hafnium alloy parts for water-type nuclear reactors.

Process for the manufacture of a flat product of zirconoum alloy or

A process for the manufacture of a flat product of zirconium alloy having a width between 50 and 600 mm from a flat cold rolled product. The cold rolled product is heated to the beta range and maintained in the beta range using an infra-red heating device with a wavelength of between 0.8 and 5 microns, the maximum temperature difference over the width of the product being less than 35.degree. C. The product is then rapidly cooled and optionally annealed to obtain a flat product, which can be a strip, sheet or band.

Process for the manufacture of a flat product of zirconium alloy

Zircaloy 2 or 4 strip is heat treated in the beta range, followed by rapid cooling by passing the strip between a first and second roller pair, each roller pair having two oppositely disposed rollers gripping the strip. Each roller pair is connected to a source of an electric current so as to complete an electric circuit including the source, the roller pairs and the strip, which causes heating of the strip to the beta range. The strip is heated at a rate less than 40.degree. C./sec between 750.degree. and 1000.degree. C., held at 1000.degree.-1100.degree. for less than 2 minutes and cooled at a rate of at least 40.degree. C./sec between 1000.degree. C. and 600.degree. C.

Controlled resistive heat treatment for a continuously moving zircaloy

The invention concerns a process for the production of a strip of Zircaloy 2 or 4 with an oxygen content of between 900 and 1600 ppm and with mechanical characteristics corresponding to the following conditions:

Zircaloy 2 or Zircaloy 4 strip having specified tensile and elastic

The invention concerns a process for the production of a strip of Zircaloy 2 or 4 with an oxygen content of between 900 and 1600 ppm and with mechanical characteristics corresponding to the following three conditions:

Growing community of inventors

Echauffour, France

Gerard Bunel