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Sliding nozzle plate production method

A manufacturing method and nozzle technology, which can be applied to manufacturing tools, casting equipment, casting melt containers, etc., can solve the problems of inability to fully exert the additive effect, difficult to densify and continue the refractory.

Pending Publication Date: 2021-11-12
TYK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These carbides cannot fully exert the additive effect at high temperatures above 1500°C, and it is difficult to continue the densification of refractories.

Method used

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  • Sliding nozzle plate production method
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Experimental program
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Embodiment

[0064] Hereinafter, the present invention will be described using examples.

[0065] [Example and Comparative Example]

[0066] As Examples and Comparative Examples, Al with an average particle size of 20 μm to 50 μm was prepared. 4 SiC 4 , carbon black (carbon material) with an average particle size of 20 μm to 200 μm, sintered alumina, metal Si with a particle size below 200 mesh, metal Al with a particle size below 200 mesh, fused magnesia, and phenolic resin A in solution ( Moisture content ratio: 0.3-0.8 mass %), solution form phenolic resin B (moisture content ratio: 1.4-1.8 mass %). al 4 SiC 4 The content ratio of S in is about 50ppm. As the sintered alumina, a sintered alumina having an average particle diameter of 3 to 1 mm, medium particles of 1 mm to 200 μm, and fine particles of less than 200 μm is used in an appropriate particle size. These raw materials are in powder form except for the phenolic resin.

[0067] Then, the prepared raw materials were weighed...

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Abstract

The objective of the invention is to provide a production method and a plate for a sliding nozzle plate comprising a refractory wherein the occurrence of cracks has been suppressed even when high temperature heat treatment is performed. This sliding nozzle plate production method is characterized by comprising: mixing (S1 and S2), when 100% by mass is the total, 2 to 23% by mass of Al4SiC4, and 2 to 10% by mass of a carbon material, the remainder being a phenol resin with a moisture content of 1% or lower and one or more from among alumina, alumina-zirconia, zirconia mullite, magnesia, and magnesia-spinel; and thereafter, heat treating (S4 and S5) at a heating temperature of 150 to 1,400 degC. The plate of the present invention is characterized by being produced by this production method.

Description

technical field [0001] The present invention relates to a method of manufacturing a slide nozzle plate. Background technique [0002] Molten steel is discharged from a container for storing molten steel through a nozzle provided in the container. The nozzle has a slide nozzle for controlling the flow rate of the discharged molten steel. The sliding nozzle has two sliding nozzle plates, the upper plate and the lower plate with inner holes, or three sliding nozzle plates with a middle plate added to it. By making these sliding nozzle plates slide relative to each other, the steel The water flow path is the opening of the inner hole to control the flow of molten steel. [0003] The slide nozzle plate is formed of a refractory. As a refractory, it is widely known to use raw materials such as alumina as the main material, add various metals, carbides, nitrides, carbon materials, etc., and sinter at a temperature exceeding 1000°C. Plate refractories, and plate refractories con...

Claims

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Application Information

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IPC IPC(8): B22D41/32B28B3/02C04B35/043C04B35/103
CPCB28B3/02C04B35/103C04B35/043B22D41/32
Inventor 余多分智博八反田浩胜
Owner TYK CORP