METHOD OF PRODUCTION OF CARBON STRUCTURAL SHEET STEEL

摘要

FIELD: metallurgy.;SUBSTANCE: invention relates to rolling, in particular to making cold-rolled sheet steel with glossy finish. In order to improve application properties of the sheet steel with the carbon content of 0.07…0.14 wt % the steel strips are cold-rolled on the continuous rolling mill in the knurled working rolls of the final stand with the average height of the surface pattern of their bodies Ra≤3 mcm producing a sheet of 2.0…2.5 mm thick and with a glossy finish, annealing of the cold-rolled coils in the bell-type furnaces with protective hydrogen atmosphere without increasing the temperature of the coolest point on the coil, starting water cooling at a temperature of 280°C and without water cooling allowing to be under the heating bell with the burners turned off for 4 hours minimum and temper rolling of the annealed strips on the grinding working rolls with Ra≤1 mcm.;EFFECT: improved application properties of the sheet steel.;1 ex