PROCESS FOR HOT-ROLLING ECONOMIC HEAD BEAM-LIKE STEEL PROFILES

摘要

The invention relates to a process for hot- rolling the economic head beam -like steel profiles by passing the bar-shaped blank (1) having square cross-section through a succession of 6 - 8 blooming passes of the usual kind : rhombus-square (2), oval trapeze - square (3), square -wide (4), through two preparing passes ( 5 and 6), then through a prefinal pass (7) and a final pass (8) of a specific shape, at rolling speeds of 1.58 ... 4.5 m/s and reducing coefficients of 1.14 ... 1.3 per passing.