Preparation method of iron runner sialon casting body

Abstract

The invention discloses a preparation method of an iron runner sialon casting body. The method comprises the following step: embedding a pipe easy to burn out in an iron runner casting body; and forming a pipe inlet and a pipe outlet in the wall of an iron runner. When the iron runner is used, the pipe easy to burn out is burnt out to form a channel, nitrogen is fed in the channel; and when the flows of the inlet and the outlet of the nitrogen channel are the same, the outlet of the channel is closed and the feeding of the nitrogen is stopped; and a filling material is pressed into the channel. The air-cooled iron runner sialon casting body prepared by using the method is high in cooling efficiency, so that the service life of the iron runner is further prolonged. The integrated iron runner sialon casting body can be used for improving the whole thermal state strength of the iron runner by dozens of times; and the iron runner material contains nitrides, so that a wetting angle of the iron runner material to slag iron is enlarged. Thus, the slag erosion resistance and the penetration resistance of the iron runner are greatly improved. Therefore, the service life of the iron runner is prolonged. As a result, the cost of an enterprise is reduced; and the generation of industrial wastes and the waste of fire-resistant raw material resources are reduced, namely, the environmental-friendly effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of iron channel material production, and in particular relates to a preparation method of an iron channel Sialon cast body. Background technique [0002] The better iron channel materials used now have a service life of 45-60 days, and the overall service life after repairing will not exceed 75 days, which seriously affects the production efficiency of the enterprise. [0003] It was found in ceramic research that Si 3 N 4 with Al 2 o 3 During hot pressing firing, found Al 2 o 3 Can be solid-fused to Si 3 N 4 Up to 60-70wt% in the lattice, forming a solid solution containing Si, Al, O, N, the four elements are listed and abbreviated as "Sialon" (this is the origin of Sialon), because Si 3 N 4 Divided into α and β types, the product of β type is called β-Sialon or β`-Sialon, and its general chemical formula is: Si 6-Z Al Z o Z N 8-Z , Z represents the number of substituted silicon atoms and nitro...

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Problems solved by technology

However, Sialon combined with Al 2 o 3 -SiC refractories must be fired in a nitrogen atmosphere, the cost is high, and the one-time investment is large. There has not been a large-scale production in our country. The country mainly relies on imports. Many steel companies are not willing to invest in higher costs. This superior material

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