Method and arrangement for producing hot-rolled steel strip
AssigneeMannesmann Aktiengesellschaft
InventorJoachim Schonbeck
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Abstract
Hot rolled steel strip is produced from continuously cast semi-finished steel in directly successive work steps, in which, after conversion of the molten steel into continuously cast semi-finished steel in a stationary process, the semi-finished steel is fed directly from the continuous casting to a continuous hot rolling mill, without prior separation, and an endless steel strip of any desired thinness is produced at the final rolling temperatures usual in process technology directly from the primary heat, using certain parameters.
Claims16
A method for producing hot rolled steel strip from continuously cast semi-finished steel, comprising the steps of:
- converting molten steel into continuously cast semi-finished steel strip in a stationary continuous casting machine;
- feeding the continuously cast semi-finished steel strip directly from the continuous casting machine to a continuous hot-rolling mill such that a thickness h.sub.o in meters of the semi-finished steel strip and a casting speed of v.sub.c in meters per minute are in accordance with the following relationship,
- h.sub.o .multidot.v.sub.c >0.487 m.sup.2 /min;
- and
- producing a final thin strip from said semi-finished steel strip using a primary heat in the semi-finished steel strip from said continuous casting machine by running the semi-finished steel strip through the hot-rolling mill having at least n number of roll stands in accordance with the relationship,
- n=0.51+3.29 lg.sub.10 (h.sub.o),
- where h.sub.o is the thickness in centimeters of the semi finished steel strip.
An arrangement for producing hot-rolled steel strip, comprising:
- a continuous casting machine converting molten steel into a continuously cast semi-finished steel strip and outputting from an output end said semi-finished steel strip such that a thickness h.sub.o in meters of the semi-finished steel strip and a casting speed v.sub.c in meters per minute are in accordance with the following relationship,
- h.sub.o .multidot.v.sub.c >0.487 m.sup.2 /min;
- a hot-rolling mill comprising n number of roll stands operatively arranged for directly receiving said continuously cast semi-finished steel strip from said continuous casting machine for producing a thin steel strip from said semi-finished steel according to the relationship,
- n=0.51+3.29 lg.sub.10 (h.sub.o),
- where h.sub.o is the thickness in centimeters of the semi finished steel strip;
- and
- each of said n number of roll stands comprising work rolls having diameters not greater than about 600 mm.
Dependencies are inferred from the claim text.