METHOD OF RECEIVING OF FLAT BAR MADE OF ZIRCONIUM ALLOY, RECEIVED BY THIS METHOD FLAT BAR AND REACTOR LATTICE OF ATOMIC POWER STATION, MADE OF THIS BAR

摘要

FIELD: metallurgy.;SUBSTANCE: invention can be used for manufacturing of atomic power station reactor lattice on light water made of zirconium alloy flat bar with Kerns coefficient FT from 0.30 till 0.70. It is cast ingot from alloy containing, wt %: Nb 0.5-3.5, Sn 0-1.5, Fe 0-0.5, Cr+V 0-0.3, S 0-100 p/mln, O 0-2000 p/mln, Si 0-150 p/mln, zirconium and unavoidable while casting admixtures - is the rest and it is treated with shaping. Then it is implemented one- or multiple hot rolling for receiving of flat bar, while the last hot rolling is implemented at the temperature from 820-(20×Nb%)°C till 1100°C without following hardening from phase α+β or β. If necessary it is implemented bar annealing at temperature non higher 800°C, after what it is implemented one- or multiple cold rolling and annealing at temperature non higher 800°C. By means of treatment of flat bar with shaping it is received lattice for slugs keeping in reactor of atomic power station.;EFFECT: providing of superior dimensional consistency of bar in transverse relative to rolling location to direction while irradiation.;6 cl, 2 tbl, 2 dwg