METHOD TO PRODUCE PATTERN SHAPES OF HIGH ACCURACY Russian patent published in 1996 - IPC

FIELD: metallurgy, methods of pieces strengthening by thermomechanical treatment used in production of high accuracy pattern shapes. SUBSTANCE: method to produce high accuracy pattern shapes provides for high speed heating of blanks up to temperature of 900 - 1150 C, heat deformation by rolling with deformation degree of 45 - 80 % and temperature of rolling finish over AAr₁,, after which accelerated cooling is exercised and cyclical tampering by speed electrical heating in temperature interval of 630 - 750 C for 5 - 15 seconds per cycle. EFFECT: method allows to produce pattern shape of high accuracy. 2 cl