METHOD FOR MAKING ROLLED PIECES Russian patent published in 2003 - IPC

FIELD: ferrous metallurgy, namely manufacture of rolled rods for construction and coiled rolled pieces by hot rolling and heat treatment. SUBSTANCE: method comprises steps of hot rolling of lots of different-diameter rolled rods at temperature 900-1100C; cyclically cooling them by water until temperature 750 - 950 C; then cooling turns of coiled rolled rod by means of ventilating air on conveyer; preliminarily preparing production process at controlling air flowrate for air cooling; upon such process at controlling air flowrate for air cooling of turns of coiled rolled rods setting air flowrate for cooling minimum-diameter rods; upon cooling turns of coiled rods by means of ventilating air on conveyer changing air flowrate depending upon air flowrate for cooling minimum-diameter rods and real diameter of rolled rods; realizing cooling by means of ventilating air on conveyer at normalized air flowrate. EFFECT: enhanced technical and economical factors of rolling mill operation due to improved uniformity of properties and structure of rods of the same kind of steel and of the same destination with different diameters. 1 tbl, 1 ex