Method for stretch-reducing of steel rolling mill loops - is used in multi-stand mill, each succeeding stand moves at higher speed than previous one

摘要

The ends of steel loops are edged, calibrated, upset, and the loops are then joint into long lengths, perhaps into continuous lengths, by electron-beam welding. The loop lengths are then moved to the stretch-reducing rolling mill. End calibration produces reproducible even loop ends. The loops can be produced cold or warm. Increased wall thickness also protects against tearing off in the mill. The upset wall sections help to identify joints after the stretch-reducing. Other similar welding processes may be used. USE/ADVANTAGE - Prevents thickened ends during stretch-reducing, internal surface of loops remains free of folds.