METHOD FOR MANUFACTURING A HOT-ROLLED I-BEAM FROM A SHAPED BLANK Russian patent published in 2021 - IPC B21B1/08 B21B1/88 

FIELD: working of metal.

SUBSTANCE: invention relates to rolling manufacture, in particular, to manufacture of I-beam profiles. A method for manufacturing a hot-rolled large-sized I-beam from a shaped blank, including manufacturing a shaped blank on a continuous casting machine or by pre-rolling, heating to a temperature of 1,150 to 1,280°C followed by removing scale, rolling on a breakdown mill and a group of universal and auxiliary mills of a universal beam-rolling mill, and cooling. An I-beam with conditional height dimensions of 800 mm, 900 mm, 1,000 mm is made from a shaped blank made in the form of a column with parallel opposite shelf sides. Prior to rolling, the shaped blank is heated to a temperature of 1,100 to 1,200°C, and rolling is executed on a breakdown mill or at least two breakdown mills, then rolling is executed on two - pre-finishing and finishing - or more groups of universal mills.

EFFECT: manufacture of large-sized I-beams from a blank of one standard size is ensured as a result.

2 cl, 2 dwg, 1 tbl