2022-11-23
2022-11-23Due to the special structure of the graphite mold. Therefore, in daily use, these special properties should also be understood by us.1. High temperature resistant type: the melting point of graphite is 3850+50°C, and the boiling point is 4250°C. Even in ultra-high temperature arc burning, the thermal expansion coefficient is very small, and the strength of graphite increases with the increase of temperature. At 2000°C , graphite strength increased - times;2. Lubricity: 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;3. Plasticity: Graphite has good toughness and can be made into very thin sheets;4. Chemical stability: Graphite has good chemical stability at room temperature, and is resistant to acid, alkali and organic solvents;5. Thermal shock resistance: When graphite is used at room temperature, it can withstand drastic changes in temperature wi
2022-11-23Graphite products maintain the original chemical properties of flake graphite, namely acid resistance, corrosion resistance and physical properties, namely high temperature resistance 3000C and low temperature resistance 204C. Its compressive strength is greater than 800kg/cm2, and it is anti-oxidation. It loses weight in air at 450°C by 1 % , the rebound rate is 15-50% (density 1.1-1.5). It also has strong self-lubricating properties. Therefore, graphite products have been widely used in metallurgy, chemical industry, petrochemical industry, high energy physics, aerospace, electronics and so on.Using the characteristics of graphite, people have deftly made different types of products according to the needs of engineering: such as high-purity graphite products, flexible graphite products, composite graphite products and so on. In order to improve the performance, graphite and fiber (including synthetic fiber), graphite wire, metal mesh, and metal processing plate are combined to make
2022-11-23Graphite molds should be produced and processed by cutting methods to improve the smoothness of the graphite mold surface and reduce the degree of adhesion between the molten metal and high-purity graphite. The composition of the carcass powder is one of the factors that cause the metal plastic film to stick to the high-purity graphite. Because iron is a strong carburizing agent, if the carcass is iron-based, there will be obvious reaction and melting between the carcass and the abrasive tool, causing the carcass melt to stick to the high-purity graphite and destroying the graphite mold. It is suggested that when calcining the iron-based carcass, a strong release agent should be brushed on the surface of the blade and the abrasive tool to reduce the adhesion of the abrasive tool during mold unloading, reduce the degree of damage, and increase the service life of the abrasive tool.2. The fracturing damage of the grinding tool is also related to the resistance of the graphite materia
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