US 7,213,432 B2Granted

Hot rolling installation

AssigneeSMS Demag AG

InventorsDieter Rosenthal, Peter Sudau, Joachim Hafer

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Abstract

A hot rolling installation should be constructed and able to be operated so that strips of materials, which can be shaped with different levels of difficulty and have a thickness of less than 1 mm, can be rolled. According to the invention, strip speeds of 15 m/sec should not be exceeded at the outlet of the last roll stand regardless of the material being used, and the hot-rolled strip should have austenitic structures. To this end, the invention provides that thin slab thicknesses of approximately 50 mm are used for easily shapeable material, that the first of seven stands is driven or executes only a smoothing pass, the slab is de-scaled in front of and behind the first stand, and that the second to seventh stand effects the reduction in thickness to less than 1 mm.

Claims5

Dependent claims

Hot rolling installation for rolling thin hot strip for a wide variety of rolling stock made of materials that can be deformed with varying degrees of difficulty, wherein the combination of the following features:

a thin slab casting line (1) for continuous slab casting,
a shear (2) following the thin slab casting line (1) for cutting the continuously cast slabs into desired lengths, which correspond to the length of a finished coil or a multiple thereof,
a roller hearth furnace (3) for buffering and tempering the cut slabs,
a descaling sprayer (5) and a seven-stand rolling train (7) following the roller hearth furnace (3), with an inter stand escaling device (6) provided between the first stand (F1) and the second stand (F2) of the rolling train (7), with a cooling line (8) located at the end of the rolling train (7), a shear (9) for cutting the semicontinuously or continuously rolled strip, and at least one coiler (10) for coiling the strip into coils, in which the thin slab casting line (1) has an adjustable strand guide.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/486,410Filed 5 Aug 2002
Priority: DE 101 37 9447 Aug 2001
Published: US 2004/0232605 A125 Nov 2004
Granted: 8 May 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B21B 1/466
For rolling metal immediately subsequent to continuous casting: in a non-continuous process, i.e. the cast being cut before rolling
B21B 1/26
In a continuous or semi-continuous process: by hot-rolling , e.g. Steckel hot mill
B21B 45/08
For de-scaling , e.g. by brushing: hydraulically
B21B 2013/003
Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories: inactive rolling stands