VERFAHREN ZUR HERSTELLUNG VON WARMBAND.

摘要

Hot band is mfd. from nonalloyed or low-alloy steel slab contg. 0.3-0.9% C, which is austenitised, hot rolled and coiled, after cooling on a run-put table. Hot rolling to a final temp. of 860 deg. C or more, with rolling speed in the last stand of at leas t7 m/s, with water cooling to 640 deg. C or more for coiling, is so controlled that the austenite-ferrite transformation only starts and is completed in the coiled material. Final. Final rolling speed for C contents of 0.33-0.49% is at least 8 m.s, for C contents of 0.50-0.65%, at least 7.5. m/s, and for C contents of 0.66-0.90% at least 7/ms, with coiling temp. respectively at least 680 deg. C, 660 deg. C, or 640 deg. C.