MERCHANT SHAPE ROLLING METHOD Russian patent published in 2005 - IPC

FIELD: rolled stock production, possibly rolling merchant bars and rods of continuously cast carbon (standard and high-quality) steel, low alloy, alloy, roll-bearing and spring steels.

SUBSTANCE: method comprises steps of heating steel continuously cast billet until austenite temperature; further multi-pass hot rolling while providing normalized temperature of rolling termination period; performing multi-pass rolling at temperature 860-1000 C of rolling termination period and at total elongation value γ selected according to kinds of steel. Invention provides complete treatment of axial zone of billet, lowered liquation of chemical elements along cross section and length of bar, regular contour of bar cross section.

EFFECT: enhanced quality, less loss of yield.

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