JPH05104209A - Method and apparatus for horizontal continuous casting - Google Patents

Abstract

PURPOSE:To obtain a casting having the desired graphite shape and solidified structure by controlling the temp. of molten metal in holding furnace, temp. distribution of the molten metal in a mold device and further, the drawing speed of a casting. CONSTITUTION:The temp. of the molten metal in the molten metal holding furnace 1 is detected by a molten metal temp. measuring instrument 2, and by working a molten metal heating device 3 so as to rise the temp of the molten metal to the preset temp. with a molten metal heating control device 4, the molten metal temp. is held to make casting temp. adjustable. On the other hand, in the mold device 5, the temp. distribution of the mold is detected by a mold temp. detecting instrument 7, and the mold is heated with a mold heating control device 9 so that the mold temp. distribution becomes the prescribed temp. gradient from the molten metal supplying side to the casting drawing side, and by operating the mold heating device 8 so as to slowly cool the casting in the solidified temp. range, the rapid cooling is prevented. Further, in a drawing device 10, the drawing speed is detected by a drawing speed detecting instrument 11 and this device is operated by a drawing speed control device 12 so as to become the suitable drawing speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal continuous casting method and apparatus.

[0002]

2. Description of the Related Art In horizontal continuous casting, a casting apparatus is provided at a pouring port of a molten metal holding furnace, the casting apparatus is cooled by this casting apparatus to form a casting, and the casting is drawn by a drawing apparatus. It is a thing. In such a conventional continuous casting method, since the molten metal is rapidly cooled, the graphite becomes an E-type graphite shape, and a solidified structure having a distribution of A-type or B-type graphite shape preferable as flake graphite cast iron cannot be obtained.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems, and as a result of earnest research by the present inventors, even in the continuous casting method, the cooling rate at the time of solidification is slowed down like sand molds. If possible, it was found that the solidification structure can obtain a graphite structure similar to that of a sand cast product, and the present invention has been completed. The purpose is to obtain a good A type graphite structure as cast. (EN) A horizontal continuous casting method and an apparatus therefor that can be obtained.

[0004]

The horizontal continuous casting method of the present invention is a horizontal continuous casting method in which a molten metal in a molten metal holding furnace is cooled by a mold cooling device in a mold device while a casting product is drawn by a drawing device. It is characterized by obtaining the desired solidification structure by controlling the temperature of the molten metal in the casting mold holding device while controlling the temperature of the molten metal in the molten metal holding furnace. Further, the horizontal continuous casting apparatus of the present invention is a horizontal continuous casting apparatus for drawing and casting a cast product by a drawing device while cooling the molten metal in the molten metal holding furnace by a mold cooling device in the casting mold device. Molten metal holding furnace equipped with measuring device, molten metal heating device and molten metal heating control device, mold cooling device, mold temperature detector, mold device equipped with mold heating device and mold heating control device, and drawing speed It is characterized in that it has a drawing device provided with an outgoing unit and withdrawing speed controller.

[0005]

Embodiments of the present invention will now be described in more detail with reference to the drawings. FIG. 1 is a control system diagram of a horizontal continuous casting apparatus.

The molten metal holding furnace 1 is provided with a molten metal temperature measuring device 2, a molten metal heating device 3, and a molten metal heating control device 4, and a mold device 5 is a mold cooling device 6, a mold temperature detector 7, a mold heating device 8 and a mold. The heating control device 9 is provided, and the drawing device 10 is provided with a drawing speed detector 11 and a drawing speed control device 12. Next, the function and effect of the above configuration will be described. First, the temperature of the molten metal to be stored in the molten metal holding furnace 1 is measured by the molten metal temperature measuring device 2, and the molten metal heating control device 4 operates the molten metal heating device 3 so as to reach a predetermined temperature of 1220 to 1250 ° C. The temperature is maintained so that the casting temperature can be adjusted. On the other hand, in the casting mold device 5, the molten metal is cooled by the casting mold cooling device 6, but the temperature distribution of the casting mold is detected by the casting temperature detector 7 in the casting mold, and the casting mold temperature distribution shows that the casting mold temperature distribution is from the molten metal supply side to the casting drawing side. The mold heating device 9 heats the mold so that a predetermined temperature gradient (1000 to 900 ° C.) is reached, and the casting product is gradually cooled in the solidification temperature range (1100 to 1200 ° C.). Activates to prevent rapid cooling A
It is adjusted so as to have a type graphite structure. Further, the drawing device 10 detects the drawing speed by the drawing speed detector 11, and the drawing speed control device 12 draws the drawing device so that the drawing speed is most suitable for the temperature of the molten metal in the molten metal holding furnace 1 and the mold temperature of the mold device 5. 10 is the one that operates.

FIG. 2 is a metallographic micrograph of a conventional continuous cast product, which is so-called E-type graphite in which flaky graphite is distributed along the resinous product and the orientation is recognized in the array. It is not preferable as a wear member. FIG. 3 is a microscopic photograph of a cast product cast according to the present invention, and it was possible to obtain an A-type graphite structure similar to the microstructure of the cast product by the sand mold.

[0008]

As is apparent from the above description, the horizontal continuous casting method of the present invention controls the temperature of the molten metal in the molten metal holding furnace and the temperature distribution of the molten metal in the mold device, and further It is intended to obtain a desired solidified structure by controlling the drawing speed of the horizontal continuous casting apparatus of the present invention.
A molten metal holding furnace having a molten metal temperature measuring device, a molten metal heating device, and a molten metal heating control device, and a casting mold device having a mold cooling device, a mold temperature detector, a mold heating device, and a mold heating control device,
The present invention is characterized by having a drawing device including a drawing speed detector and a drawing speed control device. Therefore, it is possible to adjust the casting temperature of the molten metal, control the solidification structure that can be set by the solidification time of the cast product, and moreover, it is possible to withdraw at the optimum drawing speed, so the heat removal from the cast product to the mold becomes great. Casting with the desired graphite-shaped solidification structure without preventing solidification in the mold and the generation of solidified shells in the mold due to insufficient heat removal to cause breakout. This enables stable casting of products.

[Brief description of drawings]

FIG. 1 is a control system diagram of a horizontal continuous casting device.

FIG. 2 is a metallographic micrograph of a conventional continuous cast product.

FIG. 3 is a metallographic micrograph of a continuously cast product according to the present invention.

[Explanation of Codes] 1 molten metal holding furnace 2 molten metal temperature measuring device 3 molten metal heating device 4 molten metal heating control device 5 mold device 6 mold cooling device 7 mold temperature detector 8 mold heating device 9 mold heating control device 10 drawing device 11 drawing speed Detector 12 Extraction speed control device

Claims (2)

[Claims] 1. A horizontal continuous casting method in which a molten metal in a molten metal holding furnace is cooled by a mold cooling device in a mold device while a casting is drawn by a drawing device while controlling the temperature of the molten metal in the molten metal holding furnace. A horizontal continuous casting method characterized in that a desired solidification structure is obtained by controlling the temperature distribution of the molten metal in the casting mold device and further controlling the drawing speed of the cast product. 2. A horizontal continuous casting device for drawing and casting a cast product by a drawing device while cooling the melt in a molten metal holding furnace by a mold cooling device in a mold device, in a melt temperature measuring device, a melt temperature heating device, and a melt heating device. It has a molten metal holding furnace with a control device, a mold cooling device, a mold temperature detector, a mold heating device with a mold heating device, and a mold heating control device, and a drawing device with a drawing speed detector and a drawing speed control device. A horizontal continuous casting device characterized in that