The graphite roller is mainly made of isostatically pressed graphite, the material is fine and hard, the finish is good after processing, the oxidation is slow during use, and the product will not be pulled. The graphite roller has high temperature resistance, corrosion resistance, strong oxidation resistance, The characteristic of low resistance is mainly used in the steel industry, chemical industry, environmental protection industry, and metallurgical industry.
Graphite material performance advantages:
(1) High temperature resistance
The melting point of graphite is 3850±50℃. Even if it is burned by an ultra-high temperature arc, the weight loss is very small, and the thermal expansion coefficient is also small. The strength of graphite increases with increasing temperature, and at 2000°C, the strength of graphite doubles.
(2) Electrical and thermal conductivity
The conductivity of graphite is one hundred times higher than that of ordinary non-metallic minerals. The thermal conductivity exceeds that of metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature, and even at high temperatures, graphite becomes a thermal insulator. Graphite can conduct electricity because each carbon atom in graphite forms only 3 covalent bonds with other carbon atoms, and each carbon atom still retains 1 free electron to transport charges.
The lubricating performance of graphite depends on the size of the graphite flakes. The larger the flakes, the smaller the friction coefficient and the better the lubricating performance.
(4) Chemical stability
Graphite has good chemical stability at room temperature and is resistant to acid, alkali and organic solvent corrosion.
Graphite has good toughness and can be rolled into very thin sheets.