METHOD OF MAKING FLAT SECTIONS FROM ZIRCONIUM-NIOBIUM ALLOYS Russian patent published in 2005 - IPC

FIELD: plastic metal working.

SUBSTANCE: invention is designed for manufacturing of flat sections from zirconium-niobium alloys for use as structural materials of active zone in nuclear reactors. Proposed method includes forging of ingot of zirconium-niobium alloys, hot rolling with heating in α+β-area, cold rolling with intermediate and vacuum thermal treatments. Hot rolling is carried out at one stage of heating with integral value of deformation 1nμ.2.5 and partial reductions per pass of 1nμ≤0.32 or at two heating stages at summary deformation of 1nμ≤2.8. In some cases, prior to one of hot rolling stages, hardening of semifinished products is carried out from area of existence of β-zirconium. Invention guarantees mechanical properties of structural members for active of nuclear reactors at height technical and economical characteristics of production of flat sections from zirconium-niobium alloys featuring form-changing capabilities.

EFFECT: improved economy and homogeneity of mechanical properties of rolled product.

2 cl, 2 ex, 1 tbl