Time:2022.11.23Browse:1
1. Graphite 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 material. The resistance of the grinding tool also qualitatively analyzes the high-purity graphitization level of the raw material, which is related to the thermal conductivity. The lower the resistance, the higher the thermal conductivity, and the improvement The temperature is getting faster and faster; because the compressive strength of graphite material increases with the rise of temperature, the compressive strength of high-purity graphite at 1000*C is about 20% higher than the room temperature, so graphite materials with low resistance are used, and the pressing speed Rapid heating; the compressive strength of the graphite mold in contact with the blade rises rapidly, which is not easy to cause jade cracking. In addition, the calcination time of the press table is reduced, which saves calcination costs; the air oxidation time is reduced, the air oxidation loss rate is reduced, and the frequency of use of the abrasive tool is increased.