CN107597846A

CN107597846A - Strip production method

Info

Publication number: CN107597846A
Application number: CN201711019347.0A
Authority: CN
Inventors: 周伟
Original assignee: TIANMEN HUAZHONG STEEL BAND SAW INDUSTRY Co Ltd
Current assignee: TIANMEN HUAZHONG STEEL BAND SAW INDUSTRY Co Ltd
Priority date: 2017-10-27
Filing date: 2017-10-27
Publication date: 2018-01-19

Abstract

The present invention relates to a kind of strip production method, cast first in casting machine slab, then in the milling train unit of rolling-mill housing by slab rolling into band, the at least one milling train unit for controlling multiple rolling-mill housing using machine controller works, and band has final thickness after last rolling-mill housing.There is a kind of strip production method of final thickness it is an object of the invention to provide band after last rolling-mill housing.

Description

Method for producing strip steel

Technical Field

The invention relates to a strip steel production method.

Background

The continuous rolling of steel strip with casting residual heat has long been known. This method is increasingly applicable at higher casting speeds. The slab is first produced in a continuous casting machine, flows vertically downwards out of the mold, is then turned into the horizontal direction, and the still hot strip is then fed to the rolling train. The thickness of the slab is reduced in the rolling stands of the rolling train until a strip having the desired thickness is produced.

Disclosure of Invention

The object of the invention is to provide a method for producing a strip steel with a final thickness after the last roll stand.

Method for producing strip steel, in which a slab is cast in a casting machine and then rolled in a roll train of roll stands to form a strip, characterized in that a machine controller controls the operation of at least one roll train of the roll stands, the strip having a final thickness after the last roll stand.

Casting and rolling plant for the production of strip, characterized in that it comprises a casting machine for the continuous casting of slabs, a crystallizer, two rolling stands, a first shear, heating means in the form of induction or roller hearth furnaces, and a second shear, which is followed by a finishing train with a plurality of finishing stands, which is followed by a cooling section, in front of and behind which the shears are mounted, at the end of which a coiler of known form is mounted.

A casting and rolling installation for producing strip as described above, characterized in that an inter-stand cooling device is installed between the stands.

Description of the drawings:

FIG. 1 is a schematic view of a casting and rolling mill including a caster, a roughing train and a finishing train according to a first embodiment of the present invention.

Wherein,

1 strip of material

2 casting machine

3 slab

4 rolling mill train

5 rolling mill train

6 rolling mill frame

7 rolling mill frame

8 machine controller

9 crystallizer

10 shearing machine

11 heating device

12 shearing machine

13 cooling section

14 shearing machine

15 shearing machine

16 coiling machine

17 descaling device

18 cooling device

v casting speed

Thickness of H slab

dE strip Final thickness

Detailed Description

A method for producing strip steel, comprising casting a slab in a casting machine, rolling the slab in a rolling train of rolling stands to form a strip, and controlling at least one rolling train of the plurality of rolling stands to operate by a machine controller, wherein the strip has a final thickness after the last rolling stand. The main process parameter is the casting speed v at which the strand leaves the casting machine 2. In addition, the mass flow, which is expressed as the product of the casting speed v and the slab thickness H, is also an important indicator (assuming that the product width and thickness are approximately constant). The slab 3 is rolled at the end of the plant into a strip 1 of final thickness dE. The pyrometers which can be used to determine the post-rolling temperature T of the individual finishing stand 7 are not shown. Between the several roll stands 7, separate cooling devices are installed.

Fig. 1 shows a schematic view of a casting and rolling plant for producing a strip 1. The plant comprises a casting machine 2 for continuous casting of slabs 3. The slab 3 flows vertically downwards from the crystallizer 9 and is then deflected in a known manner to the horizontal. Arranged here is a first rolling mill train 4 with two rolling stands 6. This is followed by a first shear 10, a heating device 11 in the form of an induction or roller hearth furnace, and a second shear 12. The second shear 12 is followed by a finishing train 5 with a plurality of finishing stands 7, and the finishing train 5 is followed by a cooling section 13, to which shears 14 and 15 are attached before and after. At the end of the apparatus is mounted a coiler 16 of known form. In order to optimize the cooling effect of the finished strip in the case of open stands and to ensure early cooling of the finished strip, an inter-stand cooling device 18 is installed between the last stands. This may improve product characteristics. The required final rolling temperature of the finished strip is monitored with a pyrometer after the last active roll stand.

Claims

1. Method for producing strip steel, in which a slab is cast in a casting machine and then rolled in a roll train of roll stands to form a strip, characterized in that the rotational speed of the roll train of a plurality of roll stands is controlled by a machine controller, and the strip has a final thickness after the last roll stand.