Method for rolling thin and thick slabs made of steel materials into hot-rolled strip
AssigneeSMS Demag AG
InventorErik Thomanek
Life of this patent
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Abstract
A method for rolling thin and/or thick slabs made of steel materials into hot-rolled strip, which were previously cast as thin or thick slabs in a continuous casting machine, heated to rolling temperature in a pusher furnace or in a walking-beam furnace, and rolled in a common rolling train, then cooled and wound into coils. The method is carried out in a continuous manner at maximum capacity of the roughing train according to the quality standard of the hot-rolled strip while roller wear is reduced due to the fact that the roughing train is formed inline by roughing stands and finishing stands into which thin slab sections or thick slab sections are introduced at a suitable point of the roughing train according to the thickness thereof.
Claims15
Method for rolling thin and thick slabs (2;
- 3) made of steel materials into hot-rolled strip (4a), which slabs (2;
- 3) were previously cast in a continuous casting machine (1), comprising the steps of:
- heating the thin slabs to rolling temperature in a pusher furnace (5) and heating the thick slabs to rolling temperature in a walking-beam furnace (6);
- rolling the slabs in a common rolling train (4) into strip;
- and cooling and winding the strip into coils (18), wherein successive thin slab sections (2b) from a single thin slab continuous casting machine (1), which emerge from the pusher furnace (5), or thick slab sections (3b) which emerge from the walking-beam furnace (6) and are introduced transversely into the rolling train (4), are continuously selectively passed directly into reducing roughing stands (4c), which reduce thickness (9) of the slabs, through open roughing stands (4c) or directly in front of a first rolling stand of a finishing rolling train (12), finish rolled in the finishing rolling train (12) located in a pass line with the roughing stands (4c), and only then wound into coils (18).
Dependencies are inferred from the claim text.