Heat treated tube

Details Heat treated tube Heat treated tube

C - Chemistry, Metallurgy

22

F

359/83, 148/55.8

C22F 1/18 (2006.01) G21C 21/02 (2006.01)

Patent

CA 1200475

ABSTRACT OF THE DISCLOSURE There is provided a nuclear fuel element having a zirconium alloy cladding tube with improved corrosion resistance. The cladding tube comprises a metallurgical gradient across the width of the tube wall wherein the tube has a more corrosion-resistant metallurgical condition at the outer circumference and a less corrosion-resistant metallurgical condition at the inner circumference. The metallurgical gradient can be generated by heating an outer circumferential portion of the tube to the high alpha or mixed alpha plus beta range while maintaining the inner surface at a lower temperature, followed by cooling of the tube.

422434

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