JPH05200502A - Method to cast steel continuously - Google Patents

Abstract

PURPOSE: To make it possible to introduce the end of a continuously cast material without the hindrance to a succeeding treatment stage by inserting and press fitting a sleeve corresponding to the shape of a continuous casting mold at the outlet end of the casting mold into the open end of a portion existing in the casting mold after the end of steel supply into the continuous casting permanent mold. CONSTITUTION: Steel is continuously cast in the continuous casting mold which is cooled with liquid and is opened in the upper part and lower part. The continuously cast material formed in the manner described above is deformed while the cross sectional area thereof is reduced before the complete solidification point within the region of the solidification section following the continuous casting permanent mold. After the end of the molten steel supply into the continuous casting permanent mold, the sleeve corresponding to the shape of the continuous casting mold at the outlet end of the continuous casting mold is inserted into the open end of the portion of the continuously cast material existing in the continuous casting mold and is press fitted into a casting head. As a result, the thickened end of the continuously cast material may be introduced without hindrance into the succeeding treatment stage which follows immediately after the stage described without treating the end as scrap.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention continuously casts steel in a continuous casting permanent mold which is liquid cooled and open at the top and bottom, and the continuous casting material thus formed follows the continuous casting mold. It relates to a method for continuous casting of steel which is deformed in the region of the solidification zone before its full solidification point, reducing its cross-sectional area.

[0002]

Such a method is disclosed, for example, in DE 3818077 A1 for flat products. In such a method, particularly in the arc-shaped continuous casting material guide that is performed directly following the continuous casting mold, a portion which can be deformed only incompletely by casting and rolling occurs at least at the minimum length of the deformation section after each casting. I have to be prepared. This is because if this portion is to be completely deformed, the molten steel will be squeezed out of the inside of the continuous cast material at the open end of the continuous cast material and will be applied onto the roller conveyor at a given speed.

Therefore, the casting and rolling apparatus must move away from each other according to the thickness of the continuous cast material at the mold outlet when closing the gate opening by the distributor plug at the latest. In this way, the casting and rolling apparatus only functions as a continuous casting material guide device. Thus, the thickness of the end thus formed does not correspond to the continuous cast material dimensions defined for subsequent processing.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the drawbacks of the prior art and to provide a process in which almost the entire continuously cast material formed in the continuous casting process can be fed to subsequent processing. To provide.

[0005]

The object is achieved according to the invention by the features of the characterizing part of claim 1 in a method of the type described in the preamble of claim 1. Advantageous embodiments of the invention are described in the other claims.

According to the invention, at the casting end, a sleeve, which is temperature-resistant and is preferably made of metal, is tubular and conforms to the shape of the continuous casting material is inserted into a continuous casting permanent mold, and the sleeve is Is pressed into the open end of the continuous casting (casting head) so that the edge of the sleeve welds to the initial solidified shell of the continuous casting.

The material which was conventionally cast but which remains in the continuous casting machine can be further cast and rolled according to the invention, whereby the extruded molten metal is collected in a sleeve. The sleeve manufactured from sheet steel is preferably composed of a material similar to the molten metal.

[0008]

An advantage of the present invention is that it is possible to introduce the end portion of the continuously cast material, which has been thickened in the past, as waste, and to directly introduce it into the subsequent processing step without any trouble. Even if material is extruded from the pouring head, it is avoided that the material needs to be deformed or impinged on the guide rolls to cause the equipment to stop. The method according to the invention can be applied whether the cross section is rectangular, circular or polygonal.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ulrich Siegels Germany, Day 1000 Berlin 37, Volzogenstraße 21 (72) Inventor Fritz-Peter Preschunich, Germany Day 4100 Duisburg 29 , Raiserveg 69 (72) Inventor Peter Vars, Germany 4020 Mettmann, Obschwarzbach 1 Ar, Germany

Claims (3)

[Claims] 1. Continuous casting of steel in a continuous casting mold liquid-cooled and open at the top and bottom, the continuous cast material thus formed being in the region of the solidification zone following the continuous casting permanent mold. In a method for continuously casting a steel that is deformed while reducing its cross-sectional area in front of its full freezing point at, after the end of the molten steel feed into the continuous casting permanent mold, For continuous casting of steel, characterized in that, within the open end of the part inside, a sleeve corresponding to the continuous casting mold shape at the outlet end of the continuous casting mold is inserted and pressed into the casting head the method of. 2. The cross-sectional shape of the sleeve corresponds to an initially solidified shell of a continuous casting material formed in a continuous casting mold (shell-shaped portion formed by solidification of the surface), and the sleeve is
The method for continuous casting of steel according to claim 1, wherein the edge of the sleeve is inserted into the continuous casting material with a pressure such that the edge of the sleeve is welded to the initial solidified shell of the continuous casting material. 3. The sleeve according to claim 1, wherein the length of the sleeve is determined so that the sleeve corresponds to the molten portion of the continuous cast material that is pushed back by the deformation of the continuous cast material. A method for continuously casting the steel according to.