METHOD OF PRODUCING HEAT-TREATED STEEL SHEET Russian patent published in 2020 - IPC C21D9/573 

FIELD: metallurgy.

SUBSTANCE: invention relates to a method of producing heat-treated steel sheet, having on the heat treatment line chemical composition of steel and microstructure m_target, containing from 0 to 100 % of at least one phase selected from ferrite, martensite, bainite, perlite, cementite and austenite. Method includes: A) preparatory stage, including: 1) a selection sub-step, which compares the chemical composition and microstructure m_target with a list of predetermined products; 2) sub-stage of calculation, at which calculation of at least two thermal modes TP_x, each of which TP_x corresponds to microstructure m_x, obtained at the end of TP_x, wherein calculation is carried out based on the selected product at step A.1) and TP_standard and m_i, to obtain m_target; 3) selection sub-step, on which TP_target one thermal mode is selected to obtain m_target microstructure, wherein TP_target mode is selected from TP_x and selected so that microstructure m_x is obtained to a maximum extent close to m_target; B) heat treatment stage, on which the TP_target mode is realized on the steel sheet.

EFFECT: invention enables to provide individual thermal treatment of each steel sheet, which is accompanied by a short calculation time interval.

18 cl, 5 dwg