Method for milling thin and/or thick slabs made of steel materials into hot-rolled strip
A technology for hot-rolled strip and thick slab, applied in metal rolling, inactive roll stand, etc., can solve the problems of reduced time and energy loss, short rolling time, high production cost, etc., and achieve less dimensional errors , The effect of reducing rolling wear and saving investment costs
Active Publication Date: 2007-12-26
SMS DEMAG AG
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Problems solved by technology
Higher production costs, loss of time and energy and lower yields due to this process method
Therefore, according to the prior art, an interruption in the time intervals in which the continuous casting machine occurs can only be maintained for a more intensive plant consumption.
In order to increase the efficiency of the rolling train, only the particularly short rolling times compared with the particularly long casting times can be fully utilized here.
Method used
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[0027] In a first process step, continuous casting starts in a continuous casting machine 1 for thin slabs 2 or thick slabs 3 of steel (carbon steel, alloy steel and similar steel grades). The thickness of the slab cross section 2 a as the thin slab 2 is approximately 30 mm to 70 mm. The thickness of the slab cross-section 3 a of the thick slab 3 is approximately 70 mm to 300 mm. A transition slab 16 , which will be described below, has a thickness 9 of a thin slab 2 of approximately 30 mm upstream of the roughing stand 4 c of a rolling train 4 and can therefore be fed directly into a finishing train 12 .
[0028] The steel thin slabs 2 and thick slabs 3 are cast in the continuous casting machine 1 and then rolled in a common rolling train 4 to form a hot-rolled strip 4 a and wound into a coiled strip coil 18 . The thin slabs 2 and thick slabs 3 are homogenized after continuous casting in a tunnel furnace 5 or a walking furnace 6 and heated to the first rolling stand 4a or 4c...
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Abstract
Disclosed is a method for milling thin and / or thick slabs (2; 3) made of steel materials into hot-rolled strip (4a). Said slabs are first cast as thin or thick slabs (2; 3) in a continuous casting machine (1), are heated to a milling temperature in a tunnel furnace (5) or walking beam furnace (7), are milled in a mill train (4), and are then chilled and rolled up into coils (18). Said method can be carried out in a largely continuous manner at maximum capacity of the mill train (4) according to the quality standard of the hot-rolled strip (4a) while roller wear is reduced due to the fact that the mill train (4) is formed inline by roughing stands (4c) and finishing stands (4b) into which thin slab sections (2b) or thick slab sections (3b) are introduced at a suitable point of the mill train according to the thickness thereof.
Description
technical field [0001] The invention relates to a method for rolling thin and / or thick steel slabs into hot strip, which are previously cast as thin or thick slabs in a continuous casting machine, in a tunnel furnace or heated to rolling temperature in a walk-in furnace and rolled in a rolling train, then cooled and wound into coiled strip coils. Background technique [0002] As a rule only one and the same product can always be produced in a rolling train, possibly with different dimensions, different widths or thicknesses in the case of hot-rolled strips. Since 2001, through the so-called "hybrid rolling", i.e. mixed rolling of significantly different slab thicknesses and slab widths, an intensive effort has been made to increase the load capacity of the rolling trains, thereby reducing capital investment costs and This results in lower costs for the rolled product. [0003] A method is known (WO 02 / 068 137 A1) for driving a casting and rolling plant, wherein a casting a...
Claims
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IPC IPC(8): B21B1/46B21B1/26
CPCB21B1/26B21B2201/08B21B2201/14B21B1/466B21B2013/003Y10T29/5184Y10T29/49991B21B1/46
Inventor E·托马内克
Owner SMS DEMAG AG