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A.a. Bochvar All-russian Inorganic Materials Research Institute

Antonina Vasilievna Nikulina

Vladimir Andreevich Kotrekhov

Anatoly Frantsevich Lositsky

Jury Pavlovich Shevnin

Pavel Vasilievich Shebaldov

Mikhail Ivanovich Solonin

Nikolai Vasilevich Kuzmenko

Mikhail Mikhailovich Peregud

Oleg Viktorovich Bocharov

Vladimir Andreevich Markelov

Viktor Fedorovich Bukhovtsev

Lidiya Efimovna Ageenkova

Pavel P Markelov

Sergei Jurievich Zavodchikov

Vladimir Fedorovich Seliverstov

Vyacheslav Nikolaevich Shishov

Vladimir A Markelov

Anatoly N Ivanov

Jury K Bibilashvili

Anatoly J Gusev

Nikolai Alexeevich Ganza

Sergei A Nikulin

Valentin K Shamardin

Andrei E Novoselov

Petr Ivanovich Lavrenjuk

Valery A Dubrovsky

Vladimir Vladimirovich Rozhdestvensky

Yury Konstantinovich Bibilashvili

Elena Nikolaevna Aktuganova

A zirconium-based alloy for the components of the active core of nuclear reactors comprises (on a weight percent basis): niobium, 0.5-3.0; iron, 0.005-0.5; oxygen, 0.03-0.2; carbon, 0.001-0.04; silicon, 0.002-0.1; nickel, 0.003-0.02; zirconium being the balance; the alloy structure is characterized by an &agr;-solid solution and the &bgr; Nb-phase particles sized below 0.1 &mgr;m and having the niobium content of from 60 to 95%. The alloy may further comprise particles of intermetallics Zr&mdash;Fe&mdash;Nb with the Fe/Nb ratio of 0.05-0.2. The alloy structure may also be characterized by an oxygen-hardened &agr;-solid solution and by the &bgr; Nb-phase particles, and may further comprise particles of intermetallics Zr&mdash;Fe&mdash;Nb sized below 0.3 &mgr;m.

Zirconium-based alloy elements used in nuclear reactor cores

The present invention relates to a method for producing tubing products from binary and multicomponent zircon alloys, consisting in obtaining from an ingot previously submitted to a beta distortion process p source preparation, hot forming said source preparation at the subsistence temperature of zirconium alpha&plus;beta to get a tubular blank hardenning the latter at a temperature higher by 30 to 60&deg; to the temperature at which the alloy passes from an intermediary state zirconium alpha&plus;beta to the beta state of zirconium, mechanically processing, following by a tempering process at the subsistence temperature of alpha zirconium until the finished product is obtained, the cold distortion of the tubular product being effected with the following global stretching: &mgr; >100 for the finished products and &mgr; <50 for the TREX or SUPER TREX-type semi-finished tubular products, whereby at the first stage of the cold distortion the stretching &mgr;<2.0, &mgr;&equals;S /S (where S is the cross-sectional surface of the product before the milling process and S is the cross-sectional surface of the laminated tube) and &mgr;&equals;S /S (where S is the cross-sectional surface of the blank before the first milling process and S is the cross-sectional surface of the finished tube after the last milling process).

Method of manufacturing zirconium alloy tubes

Zirconium-based material, products made from said material for use in

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Moscow, Russia

Antonina Vasilievna Nikulina