A heat-shock-resistant ceramic pipe mold and its preparation method

Abstract

The invention belongs to the field of metallurgy casting and smelting, and particularly discloses a thermal shock resistant ceramic tube mold and a preparation method thereof. The thermal shock resistant ceramic tube mold comprises an inner ceramic tube mold, wherein an outer steel-made tube mold layer sleeves the outer side of the inner ceramic tube mold; a self-flowing thermal-resistant casting material is filled between the inner ceramic tube mold and the inner ceramic tube mold; the inner ceramic tube mold is made of the following raw materials in percentage by weight: 40-50% of carbon silicon micro powder, 20-25% of silicon powder, 20-25% of primary aluminum nitride powder, 2-5% of graphite micro powder, 2-3% of zirconium oxide micro powder, 0.5-1% of yttrium oxide micro powder, 0.2-0.5% of absolute ethyl alcohol and 3-4% of an adhesive. The thermal shock resistant ceramic tube mold is high in pressure resistance, good in breaking strength, good in high temperature corrosion resistance and long in service life; when nodular cast iron tubes are produced by using the thermal shock resistant ceramic tube mold, the production procedures can be reduced, the energy is saved, the equipment maintenance expense is reduced, and the production cost is lowered, so that the nodular cast iron pipe thermal shock resistant ceramic tube mold has great significance for the metallurgy tube industry and has wide application prospect and popularization values.

Description

(1) Technical field [0001] The invention belongs to the field of metallurgical casting and smelting, and in particular relates to a heat-shock-resistant ceramic pipe mold and a preparation method thereof. (2) Background technology [0002] Centrifugally cast ductile iron pipes are widely used in urban and industrial water supply and drainage pipes because of their advantages such as high strength, good plasticity, good corrosion resistance, long service life, and low construction costs. Among the molds used in centrifugal casting of ductile iron pipes, the most important part is the pipe mold. The quality of the pipe mold directly affects the quality of the ductile iron pipes cast by it, and the cost of the pipe mold occupies a considerable part of the cost of the cast pipe. A large proportion, its consumption directly affects the cost of cast pipe. Therefore, the quality, cost and life of the pipe mold are directly related to the quality of centrifugal casting ductile iron...

AI Technical Summary

Problems solved by technology

However, the lining of resin sand and the spraying process of paint are complicated. After the resin sand and paint are corroded by high-temperature molten iron, repeated spraying is required. The thickness of the pipe mold and the quality of spraying are not easy to control, resulting in the poor quality of the outer surface of the produced ductile iron pipe, and the difference in the quality of the outer surface between the cast pipes is large, which will also affect the quality of the centrifugally cast ductile iron pipe product and the company's reputation. economic benefits

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