Importance

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Abstract

The invention relates to a production method for producing, on a production installation (1), flat products, also of a large width, from continuously cast slabs having a large or medium thickness or from thin slabs. Said production installation is comprised of a single or multiple stand blooming train (4), of a roller table (3), which is provided for conveying the rolling stock and, optionally for oscillating, of a roller table section (5) with hinged heat-insulating covering hoods. The production installation is also comprised of a straightening unit (6) for straightening the pre-strips, of an, in particular, inductive heating installation (7) for effecting the controlled heating of the pre-strips to a defined temperature over the length and width of the pre-strips, of a multiple-stand finishing train (10), of a delivery roller table with devices (11) for cooling the hot rolled strip, and of subsequently arranged coiling machines (12) for coiling the finished strip. In the single or two-stand blooming train (4), one or more slabs comprised of carbon steels having an average carbon content of approximately 0.2 to 0.8% or of alloyed case hardening steels or heat-treatable steels are rolled on the roller table (3) to form one or more pre-strips. Said rolling is carried out in two stages with a pause between the same for effecting an intermediate cooling by oscillation. The pre-strips are heated over the length and width thereof to a defined temperature by the combined action of the covering hoods and heating installation, and are rolled in a multiple-stand finishing train (10) in the two-phase region in order to form thin high-strength finished strips.

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First Claim