JPS60238003A - Installation for continuous production of thin sheet - Google Patents

Abstract

PURPOSE:To provide the decrease in rolling energy and heating energy, etc. by disposing a hot rolling device for light draft into a non-oxidation chamber formed between a continuous casting machine and cooler. CONSTITUTION:The cooler 5 which cools a sheet material 4 down to the temp. suitable for rolling is provided on the upper stream of a rolling mill 2 and a closed duct 6 is disposed between said cooler and the outlet of the continuous casting machine 1. An inert gas such as N2 is supplied into the duct 6 from a feeder 7 to form the non-oxidation chamber. The hot rolling device 8 for light draft consisting of vertical rolls and horizontal rolls is disposed in said chamber. The material is lightly rolled down by the device 8 prior to cooling, by which thermal cracking is prevented. The gaseous N2 or the like is filled in the non- oxidation chamber and therefore the generation of oxide scale is prevented. The rolling energy and heating energy are thus considerably economized as compared with a continuous casting machine for a slab.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to equipment for continuously manufacturing thin plates.

[Conventional technology]

The most common method for manufacturing thin metal sheets, and still in use today, is to cast a thick slab using a continuous slab casting machine and roll it 5 to 10 times or more on a separate hot rolling line. It is thinned and wound up using a winder to form a hot coil, and then passed through a cold rolling line to form a final product as a cold rolled material. However, this method requires many rolling steps and a huge amount of rolling equipment, which increases equipment costs.Also, it is necessary to heat the slab and control it at a constant temperature, so it requires a large amount of rolling. Requires energy and heating energy.

Against this background, in recent years, twin-roll, belt-type, or caterpillar-type continuous sheet casting machines have been developed that can cast thin metal sheets directly from molten metal, and the sheets cast from these casting machines can be cast online. A continuous thin plate manufacturing facility has been proposed that allows rolling and finishing of thin sheets to a predetermined thickness.

However, such continuous thin plate production equipment has problems such as scale removal and hot cracking of the plate material when cooling for cold rolling, so currently it is not being implemented as a continuous thin plate production equipment. There are very few examples.

[Problem that the invention seeks to solve]

The object of the present invention is to skillfully solve problems such as scale removal and hot cracking, and to embody the continuous thin plate manufacturing equipment described above.

[Means for solving problems]

The present invention provides continuous thin plate manufacturing equipment in which a plate material cast from a continuous plate casting machine is cooled by a cooling device and then rolled by a cold rolling machine installed online.
A non-oxidizing chamber in which N2 gas or the like is blown is formed to surround the line of the plate material between the casting machine and the cooling device, and a hot rolling device for light reduction is installed at an appropriate position within the non-oxidizing chamber. It has a configuration in which

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

(1) is a twin-roll continuous plate casting machine, (2) is a cold tandem rolling machine installed downstream of the casting machine (1), and (4) is a plate material cast by casting machine (1). , (3) are nine winding machines for winding up the thin plate material (4) rolled by the rolling mill.

A cooling device (5) located upstream of the rolling mill (2) for cooling the plate material (4) cast from the casting machine (1) with a roller at a temperature (normal temperature) suitable for rolling in the rolling mill (2). A plate material (4) is provided between the cooling device (5) and the outlet of the casting machine (1).
A blocking duct (6) is arranged to surround the line, and an inert gas supply is provided to the duct (6) for supplying an inert gas such as N2, Ar, He, etc. into the duct (6). A device (7) is connected to form an oxidation-free chamber in the duct (6), and a cooling device (7) in the duct (6).
A light rolling hot rolling device (8) consisting of vertical rolls and horizontal rolls is arranged in the vicinity. The casting machine (1) is equipped with an automatic plate thickness control function, and the rolling mill (2) is equipped with a shape control function.

In the above configuration, the plate material (
4) is cooled to a predetermined temperature by a cooling device (5), and then cold-rolled by each rolling mill (2) to form a thin plate material (9).
The plate material (4) cast from the casting machine (1) is rapidly cooled, and hot cracking is likely to occur in the plate material (4). . Therefore, in the present invention, before cooling the plate material (4), light reduction is applied by the rolling device (8). Note that this rolling device (8) only needs to prevent thermal cracking of the plate material (4), so one device is sufficient.

In addition, since the scale on the surface of the cast plate material (4) is caused by oxidation, in the present invention, the entire period from the casting machine (1) until the plate material (4) discharged from the casting house is cooled. Duct (6
) and further supplies an inert gas into the duct (6) from the inert gas supply device (7) to make the inside of the duct (6) an oxidation-free chamber, thereby preventing the generation of oxidized scale. Can be done.

It should be noted that the present invention is not limited only to the above-mentioned embodiments, and it is of course possible to make various changes without departing from the gist of the present invention.

〔Effect of the invention〕

As explained above, according to the present invention, problems such as oxidation scale and hot cracking, which have conventionally hindered the realization of continuous thin plate manufacturing equipment, can be solved, so that continuous thin plate casting equipment can be realized. Compared to conventional continuous slab casting, this method has excellent effects such as simplifying equipment and processes, reducing running costs and initial costs, and reducing rolling energy and heating energy.

[Brief explanation of drawings]

The figure is an explanatory diagram of the thin plate continuous casting equipment of the present invention. (1) is a continuous plate casting machine, (2) is a cold tandem rolling machine,
(4) indicates a plate material, (5) a cooling device, (6) a closing duct, (7) an inert gas supply device, and (8) a hot rolling device. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) In a continuous thin plate production facility in which a plate material cast from a continuous plate casting machine is cooled by a cooling device and then rolled by a cold rolling machine installed online, there is no space between the casting machine and the cooling device. A continuous production facility for thin plates, characterized in that a non-oxidizing chamber is formed so as to surround a line of plate materials, and a hot rolling device is disposed at an appropriate position within the non-oxidizing chamber.