HOT ROLLING AT WIDE-STRIP SEMI-CONTINUOUS MILL Russian patent published in 2017 - IPC B21B1/26 

FIELD: metallurgy.

SUBSTANCE: invention can be used in the production of wide strips with transverse gage interference not more than 0.06 mm in the semi-continuous hot rolling mills. The method includes rolling in rough and finish groups of stands . In the rough group of stands produce not more than 3 finishing passes, and in the finishing group of stands within the same working rolls campaign, in the first two group of stands the rolling is provided in the working rolls with concavity not more than 0.30 mm from the initial cylindrical barrel radius, and in the subsequent stands - in the working rolls with a concavity not more than 0.15 mm. In the beginning of working rolls campaign, the barrels heating-up of the working rolls is done by rolling not more than 30 strips with width B₁<(B-50) mm, the next rolling minimum 900 t of rolled products with width B_2,mm. At that B≤B₂≤(B+50), and then rolling not more than 1500 t of rolled products with specified width B, mm, at the end of the working rolls campaign.

EFFECT: increased accuracy of geometrical dimensions over the strips width.

1 tbl