Method for continuously-casting steel plate of 1.5-2.5% silicon content without surface and internal cracks

A technology of silicon content and steel plate, which is applied in the field of continuous casting of steel plate with a silicon content of 1.5-2.5%, can solve the problems of brittleness, easy fracture of steel plate, poor quality of steel coil and sheet, etc.

Inactive Publication Date: 2005-04-06
INDIA IRON & STEEL ADMINISTRATIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the cast steel plate becomes brittle at temperatures below 100°C
Therefore, the steel plate is prone to breakage...

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0012] Therefore, the present invention provides a method for continuously casting molten steel with a high silicon content of 1.5-2.5% to produce steel plates, the method comprising:

[0013] Pour the molten steel into the tundish of the continuous casting machine whose temperature is kept at 1525-1540°C;

[0014] Make molten steel drip into the mold from the tundish, keep the molten steel for 60-70 seconds, the mold has a dummy bar at its bottom;

[0015] Pull down the dummy bar at the bottom of the mold at an average speed of 0.6-0.8m / min;

[0016] applying casting powder on top of the molten steel in the mould;

[0017] The steel plate is prepared by cooling the solidified strip obtained from the die by adding water in an amount of 0.9-1.0 liter of water / kg of steel.

[0018] the element

C

Si

mn

S

P

Al

(soluble)

N

Fe

Wt%

most

0.03

1.5-2.5

most

0.3

most ...

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PUM

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Abstract

The method for continuously casting steel plate whose surface and interior have no crack and silicon content is 1.5-2.5% is characterized by that under the controlled condition said method can be implemented by adopting one step process and utilizing moten steel with selective chemical composition. The temp. of molten steel in the intermediate tank is 1525-1540 deg.c, mould-charging time is 60-70 sec., and cast speed is 0.6-0.8 m/min. Said method further includes casting power agent with defined softening point, melting paint, pouring point and viscosity, and retains a selective strength of water-cooled steel plate. Said method is high in production efficiency, and its end products, such as steel coiled pipe and plate material also have excellent properties.

Description

technical field [0001] The invention relates to a method for continuously casting steel sheets with a silicon content of 1.5-2.5%, which are free from cracks on the surface and inside. technical background [0002] Traditionally, steels with a high silicon content of 1.5-2.5% are cast via the ingot casting route. Metal ingots weighing 2-10 tons are cast by pouring molten steel into molds made of cast iron. The mold is actually an elongated box with a rectangular or circular cross-section, with an opening above it. After the molten steel has solidified in the mold, the solid metal ingot is released from the mold. [0003] The solid ingot is then heated in a soaking furnace and hot rolled into plates. Therefore, this traditional method for preparing steel plates includes three steps: (1) casting metal ingots; (2) heating the metal ingots in a soaking furnace; Hot rolled into sheets. [0004] As mentioned above, the casting method of the metal ingot casting route has a rel...

Claims

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Application Information

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IPC IPC(8): B22D11/04B22D11/111C22C38/02
Inventor 桑塔奴・库马尔・拉伊比雷斯沃・穆霍帕德伊阿西姆・库马尔・拉伊尼马尔・普拉丹索姆那特・高希
Owner INDIA IRON & STEEL ADMINISTRATIVE
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