Preparation process of carbon/ceramic-graphite composite material and carbon/ceramic-graphite composite material prepared through preparation process

Abstract

The invention discloses a preparation process of a carbon / ceramic-graphite composite material and the carbon / ceramic-graphite composite material prepared through the preparation process. The carbon / ceramic-graphite composite material is characterized in that a coupling layer and a carbon / ceramic material reinforced layer are sequentially bonded to a graphite base body through high-temperature adhesives, wherein the thickness of the carbon / ceramic material reinforced layer ranges from 1.5 mm to 2.5 mm. The carbon / ceramic-graphite composite material has high thermal conductivity (150 W / m.k) and excellent strength, wear resistance and corrosion resistance, and is especially applicable to manufacturing of continuous casting crystallizers.

Description

Technical field: [0001] The invention relates to a composite material, specifically a composite material composed of carbon / ceramic material and graphite and its products. Background technique: [0002] In the continuous casting process of metal materials, the crystallizer (mold) is the heart of the continuous casting equipment. The high-temperature molten metal passes through the continuous casting mold to form products of a certain specification. Therefore, the continuous casting mold is used in very harsh conditions. It not only requires the mold to be resistant to high temperatures (greater than 1300°C), high in strength, and good in thermal conductivity. It can withstand the erosion and erosion of molten metal, has good wear resistance and strong oxidation resistance. Therefore, there are very few materials that can meet the above conditions. The structure of the existing continuous casting crystallizer is a continuous casting crystallizer with a mold cavity composed o...

AI Technical Summary

Problems solved by technology

Therefore, there are very few materials that can meet the above conditions. The structure of the existing continuous casting crystallizer is a continuous casting crystallizer with a mold cavity composed of two graphite plates and inserts. It is difficult for the graphite plate to fully meet the above performance requirements.

At present, the service life of the copper continuous casting mold used in China is only 3-5 days if domestic materials are used, and 10-15 days if imported graphite materials are used, which causes a lot of loss of the mold and affects the production of the production line efficiency, product quality and increased production costs

The root cause of the short life of the crystallizer made of graphite material is that the performance of the graphite material itself cannot meet the requirements

At present, this problem is mainly focused on how to improve the performance of graphite, such as depositing pyrolytic carbon or boron nitride on the surface of graphite template to strengthen the graphite surface, or using high-pressure densification or using imported high-purity fine-grained isostatic graphite materials, But these measures have failed to change the nature of graphite, so they have failed to achieve significant results

Images