Process for preparing based zircaloy contg. niobium for nuclear fuel rod coating

• Main Authors: CHONG RYONG-HWAN, CHOE BYON-GWON, JOONG-HYOK
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2004
• Edition: 7
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; FORGE FURNACES; FORGING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HAMMERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PERFORMING OPERATIONS; PHYSICS; PRESSING METAL; PUNCHING METAL; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; RIVETING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

本发明涉及制备用于核燃料棒包层的具有优异耐腐蚀性的含铌的锆基合金的方法。本发明的方法包括熔化合金、β-锻造、β-淬火、热加工、真空退火、冷加工、中间退火和最终退火，藉此α-Zr基体中的铌浓度从过饱和状态降低至平衡状态，以改善合金的耐腐蚀性。该含铌的锆基合金可应用于轻水反应堆和重水反应堆中芯的核燃料棒包层。 The present invention relates to a method for manufacturing zirconium-based alloys containing niobium with superior corrosion resistance for use in nuclear fuel rod claddings. The method of this invention comprises melting of the alloy, beta -forging, beta -quenching, hot-working, vacuum annealing, cold-working, intermediate annealing and final annealing, whereby the niobium concentration in the alpha -Zr matrix decreases from the supersaturation state to the equilibrium state to improve the corrosion resistance of the alloy. Such zirconium-based alloys containing niobium are usefully applied to nuclear fuel rod cladding of the cores in light water reactors and heavy water reactors.