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Abstract

The material, according to the present invention, based on a Zr contains also the following components, on a weight percent basis: 0.5 to 1.5 Nb, 0.9 to 1.5 Sn, 0.3 to 0.6 Fe, 0.005 to 0.2 Cr, 0.005 to 0.04 C, 0.05 to 0.15 O, 0.005-0.15 Si, Zr being the remainder. The proposed product used in the core of nuclear reactors and made from the aforementioned material, features a microstructure which is essentially a zirconium matrix strengthened with particles of the stannfferous and ferriferous intermetallides; at least 60 volume percent of a total amount of the ferriferous intermetallides falls on the particles of the intermetallides of the type of Zr(Nb,Fe).sub.2, Zr(Fe,Cr,Nb), and (Zr,Nb).sub.3 Fe, with the interparticle distance from 0.20 to 0.40 m. The process for producing products used in the core of nuclear reactors and made from the aforementioned material comprises producing an ingot, its preliminary beta-treatment, producing a billet by hot forming of the ingot at analpha-zirnium existence temperature, annealing the billet at 380.degree. to 650.degree. C., cold forming of the billet involving intermediate annealing procedures at an alpha-zirconium existence temperature, and finishing the billet till obtaining the finished product.

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First Claim