MANUFACTURING METHOD OF BROAD HOT-ROLLED STRIPS Russian patent published in 2009 - IPC B21B1/22 

FIELD: metallurgy.

SUBSTANCE: method includes heating of slabs for hot rolling, rolling in rough and finishing continuous trains, cooling of strip by water from the top and bottom by sections of quench on collecting roller table with further winding into the reel at temperature 500-600°C. Microstructure with pearlite of dispersion 2-6 point is provided ensured by temperature of rolling finishing and winding is installed depending on dependence from the finite thickness of strips: for strips of thickness from 6.0 mm up to 4.5 mm 750-800°C, for strips of thickness from 4.5 mm up to 3.5 mm - 750-820°C, for strips of thickness from 3.5 mm up to 2.8 mm - 750-830°C, for strips of thickness from 2.8 mm up to 2.4 mm - 750-840°C, and for strips of thickness less 2.4 mm - 750-850°C, at that winding temperature depending on finite thickness is installed for strips of thickness from 6.0 mm up to 4.5 mm -560-600°C, for strips of thickness from 4.4 mm up to 3.5 mm - 580-620°C, for strips of thickness from 3.4 mm up to 2.8 mm - 590-630°C, for strips of thickness from 2.7 mm up to 2.4 mm - 600-640°C, and for strips of thickness less 2.4 mm - 610-650°C.

EFFECT: effectiveness increase of hot-rolled strip processing into cold-rolled produce ensured by providing in hot semi-finished rolled products from low-carbon grades of steel of optimal microstructure.

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