JPS62224454A - Mold for continuous casting - Google Patents

Abstract

PURPOSE:To always uniformize a heat radiation near the meniscus without reducing the heat radiation from the whole mold by adjusting the mold heat radiation near the meniscus by fitting heating elements, which are near the meniscus in the inside or at the back faces of cooling plates of the mold, by changing of electric current. CONSTITUTION:The heating elements 3 are arranged near the meniscus in the inside or at the back faces of Cu-made cooling plates 1, and the heating value by the plural heating elements 3 is adjusted by changing the electric current as transmitting to the current regulator 7, based on the result, which calculate the temps. measured by plural thermocouples 4, through a temp. calculating meter 8. In this way, as proper current is always turned on in the heating element 3, the temp. of near the meniscus position of the Cu-made cooling plate 1 is made to the prescribed temp. Therefore, the heat radiation near the meniscus of the Cu-made cooling plate 1 arranged on the mold frame 2 is uniformized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a continuous casting mold, and more particularly to a continuous casting mold that can uniformize the amount of heat removed near the meniscus.

rPrior Art 1 Generally, in continuous casting of metals or alloys, cracks on the surface of a cast slab may occur during the initial stage of solidification in the mold due to unevenness in the amount of heat removed from the mold.

Techniques to prevent such slab surface cracks include: (1) Reduce the unevenness of heat removal by reducing the amount of mold cooling water.

(2) Provide irregularities on a portion of the surface of the 11-type cooling plate to create an air gap between the mold cooling plate and the slab, thereby reducing non-uniformity in the amount of heat removed.

That is what is being done.

However, these techniques have the following problems.

In method (1), the amount of heat removed from the entire mold is reduced, so when high-speed casting is performed, troubles such as breakout are likely to occur due to insufficient solidified shell thickness at the lower end of the mold.

In method (2), the unevenness on the inner surface of the mold wears out during continuous S-burning, making it difficult to maintain the above-mentioned effect of reducing unevenness in the amount of heat removed due to the air gap. In addition, it is not possible to immediately respond to changes in mold width and casting speed.

[Problem to be Solved by the Invention 1] The present invention has been made in view of the problem of the amount of heat removed during conventional continuous casting as explained above.
As a result of intensive research conducted by the present inventor, we have found that, without reducing the amount of heat removed from the entire mold, it is possible to
We have developed a continuous casting mold that can always maintain a uniform amount of heat removal near the mold meniscus.

[Means for Solving the Problems 1] The continuous casting mold according to the present invention is characterized in that a heating element is attached to the inside of the cooling plate of the mold or near the meniscus on the back surface of the mold.

The continuous casting mold according to the present invention will be explained in detail below.

The continuous casting mold according to the present invention will be specifically explained using examples shown in the drawings.

FIG. 1 is a plan view of a continuous casting mold according to the present invention;
The figure is a side sectional view of a continuous casting mold according to the present invention.

That is, in FIG. 1, a copper cooling plate 1 is mounted on a mold frame 2.
The heating element 3 is attached near the meniscus within the copper cooling plate 1. The heating element 3 may be attached near the meniscus on the back surface of the copper cooling plate 1, and a plurality of heating elements (3) may be arranged within the copper cooling plate 1 or near the meniscus on the back surface.

In addition, in FIG. 2, the heating elements 3 are provided within the copper cooling plate 1 or near the meniscus on the back surface, and the amount of heat generated by the plurality of heating elements 3 is determined by measuring the temperature with a plurality of thermocouples 4. The result calculated by the temperature calculation meter 8 is transmitted to the current adjustment meter 7, and as a result, the current is adjusted by the current adjustment meter 7, so that an appropriate current is always applied to the heating element 3 and is constant. The temperature near the meniscus of the cooling plate 1 can be set to a predetermined temperature, and therefore the amount of heat removed near the meniscus of the copper cooling plate 1 provided on the mold frame 2 can be made uniform.

This heating element has a nickel-chromium or chromel-alumel coil installed inside or on the back of the copper cooling plate.
A heating element other than this one may be used.

[Effect of the invention 1 As explained above, since the continuous casting mold according to the present invention has the above configuration, the local amount of heat removal within the mold can be adjusted, and the amount of heat removal from the entire mold can be reduced. Since the amount of heat removed from the bond mold in the vicinity of the meniscus can be adjusted by increasing or decreasing the current, it has the effect of being able to immediately respond to changes in casting conditions.

[Brief explanation of drawings]

1 and 2 are a plan view and a side sectional view of a continuous casting mold according to the present invention. 1. Copper cooling plate, 2. Mold frame, 3. Heating element, 4. Thermocouple, 5. Molten metal, 6. Solidified shell. tl diagram

Claims (1)

[Claims] A mold for continuous casting, characterized in that a heating element is attached to the inside of the cooling plate of the mold or near the meniscus on the back surface of the mold.