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

摘要

The invention relates to a process for hot-rolling G-head beam-like steel profiles by passing the bar-shaped blank (1) with square or round cross-section through a succession of 1 ... 11 usual blooming passes: rhombus - square (2), oval trapeze- square (3), square - wide (4), through a prefinal pass (5) and through a final pass (6) of specific shape, wherein the product (1') passed through the blooming passes (2, 3 and 4) is passed between the prefinal (5) and final passes (6) at a rolling speed of 2 ... 4.5 m/s and with reduction coefficients of 11.1 ... 1.4 per passing.