METHOD OF PRODUCTION OF ROLLED PRODUCTS IN LIGHT-SECTION AND WIRE MILLS Russian patent published in 2003 - IPC

FIELD: metallurgy; particularly, production of bar sections of wide steel grade range; possibly, light-section and wire mills. SUBSTANCE: the aim of this method is enhancement of technical and economic indices of mill operation owing to optimization of mode of billet heating in reheating furnace without increase of load in lines of main drives of mill stands at the area with minimum metal temperature. Out of steel grade range of products being rolled in a certain rolling mill, the least plastic steel is chosen and rolling temperature of this steel is determined from the point of view of sufficient plasticity and strength characteristics of stands. Distribution of temperature during rolling over mill length is established with revealing mill area with minimum rolling temperature and determining drop of metal temperature from reheating furnace to this area. Deformation resistance of the least plastic metal is to be determined for temperature specified as sum of minimum possible temperature of its rolling and temperature drop from reheating furnace to area with minimum metal temperature over mill length. The value of this deformation resistance is adopted to be the same for the balance steel grades. In accordance with specified deformation resistance, heating temperature of billets of each steel grade of product mix of mill is determined. EFFECT: increased capacity of furnace, reduced scale losses, elimination of overload in lines of main drives of stands. 1 ex