METHOD OF H-BAR ROLLING Russian patent published in 2016 - IPC B21B1/08 

FIELD: metallurgy.

SUBSTANCE: split I-billet produced at the rougher is rolled at a tandem set composed by the first universal stand, auxiliary duo-stand and second universal stand. Rolling is performed in three stages. At the first step, rolling is performed at the auxiliary and second universal stands in continuous reversible mode. At the second step, rolling is performed at the second universal, auxiliary and first universal stands in continuous mode in one pass. At the third step, rolling is performed at the auxiliary and first universal stands in continuous reversible mode. Section flanges are rolled at the angle to vertical plane not exceeding 9 degrees at the second universal stand and not over 4.5 degrees at the first universal stand.

EFFECT: reduced probability of defects in the section joints.

6 dwg