BLANK ROLLING METHOD Russian patent published in 2004 - IPC

FIELD: rolled stock production, possibly rolling cast steel square cross-section blanks in merchant bar and continuous billet rolling mills.

SUBSTANCE: method for rolling blank comprises steps of multiple reduction of blank between rolls with rhomb and square grooved passes; performing reduction of blank during first pass with elongation factor 1.15 -1.22 in rhomb grooved pass whose lateral sides near apex of small diagonal along length 0.15 - 0.30 of rhomb side are arranged by right angle and joined with respective sides of rhomb; performing reduction during second pass in rhomb grooved pass with elongation factor 1.05 - 1.10; then reducing blank in rolls with square grooved pass.

EFFECT: improved biting of blank, prevention of distortion of blank geometry.

1 dwg, 1 tbl, 2 ex