4. Finishes and controls
After the final shaping and heat treatment operations, surface finishes can be applied, depending on the required surface finish. These may include simple brushing, pickling, polishing, sandblasting or machining. As with all material removal operations involving Zr and Hf, the potentially flammable nature of the particles created by these surface finishes must be taken into account.
Finished products (tubes, bars and flat products) undergo stringent quality controls. Non-destructive testing (visual, ultrasonic, eddy current) is carried out on 100% of products delivered. Destructive tests (microstructure, crystallographic texture, size and nature of precipitates, mechanical tests, corrosion tests, etc.) are carried out on a sampling basis to guarantee the stability of the various processes, as well as when modifying ranges or equipment.
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Finishes and controls
Conclusion
Bibliography
Software tools
FORGE NxT, TRANSVALOR S.A., Parc de Haute Technologie – 694 Avenue du Dr. Maurice Donat – 06255 Mougins cedex – France, http://www.transvalor.com
Events
Conference: International Symposium on Zirconium in the Nuclear Industry, ASTM B10
Committee, every three years https://www.astm.org/MEETINGS/index.html
Standards and norms
French standards
- Corrosion of metals and alloys – Aqueous corrosion testing of zirconium alloys used in nuclear reactors. - NF EN ISO 10270 - juillet 2008
- Description and qualification of a welding procedure for metallic materials – Welding procedure qualification test – Part 5: arc welding on titanium, zirconium and their alloys. - NF EN ISO 15614-5 - septembre 2004
- Welder qualification...
Directory
Main producers of nuclear-grade zirconium alloys :
France :
Framatome, http://www.framatome.com
United States :
ATI Metals, https://www.atimetals.com
Westinghouse...
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