DECOUPE DE COMPOSANTS METALLIQUES PAR FISSURATION INTERGRANULAIRE
This study relates to a new technique for cutting steel components of nuclear installations which produces virtually no secondary waste. This technique relies on a controlled intergranular fissuration produced by the introduction into the steel component of molten metal in addition to the application of mechanical constraints. Cutting have been carried out on various materials, including: + stainless steel sheet varying between a few mm and 50 mm thickness; + mild steel plates varying between 20 mm and 60 mm thickness. It may be possible to cut pieces of mild steel up to 100 mm thick. On the basis of experimental results, heating methods were selected and fissuration parameters for the materials and the various thicknesses were determined; in the case of the stainless steel sheets (1 + 5 mm), cutting in various positions (flat position, cornice) was carried out by remote handling techniques. In addition, a thermal measurement installation using an infrared camera was devised to follow variations in the thermal field of the component. Associated with the three-dimensional computer code COCO developed by the CEA, this installation allows the prediction of changes in the mechanical constraints around the fissured zone when the cutting parameters vary, and therefore the control of the cutting mechanism.
Références bibliographiques: EUR 10037 FR (1985), MF, 55 P., BFR 150, BLOW-UP COPY BFR 275, EUROFFICE, LUXEMBOURG, POB 1003
Disponibilité: Can be ordered online
Numéro d'enregistrement: 1989124082900 / Dernière mise à jour le: 1987-01-01
Langues disponibles: fr