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Selection and use of graphite crucible materials

Selection and use of graphite crucible materials

What points should be paid attention to in the selection of crucible materials: crucibles are used for smelting, and usually the temperature is extremely high, so the raw materials for making crucibles should have high refractoriness and a strong high temperature resistance coefficient. In addition, the raw material of the crucible must have sufficient strength. During the smelting process, the impact of high temperature, etc. will cause wear and tear. Therefore, if the strength of the raw material is not high, it is likely to cause the crucible to become more undulating and lack toughness.

The shrinkage coefficient of the crucible should be small, and it can withstand rapid changes in temperature without deformation and cracking. In the selection of materials, attention should be paid to no chemical reaction with the molten metal, and the high temperature resistance of the chemical metal should also be high. churn occurs. When smelting metal, high temperature is required, and the selection of crucible materials should be based on chemical stability at high temperature. It can be seen that a lot of attention should be paid to the selection of materials for crucibles, and different materials are used for their purposes. For example, graphite crucibles should be used for melting aluminum and aluminum alloys.

Instructions for the correct use of graphite crucibles:

When feeding the graphite crucible, do not squeeze it too tightly to prevent the metal from thermally expanding and cracking the crucible. The service life of the graphite crucible is related to the usage. It should be avoided that the strong oxidizing flame is directly sprayed on the crucible, and the oxidation of the raw material of the crucible will be short-lived. Put it in a dry place after use, avoid rainwater intrusion; before use, it must be slowly baked to 500 degrees Celsius before use. When taking out the molten metal, it is best to scoop it out with a spoon, and use calipers as little as possible. If you use calipers and other tools, it should be consistent with the shape of the crucible to avoid excessive local force and shorten the service life. In addition, it is also recommended here that the graphite crucible should be used continuously, so as to better exert its high performance. If it is not used for a long time, it may affect the performance of graphite.

Xingtai Lingte Technology Co., Ltd. is a manufacturer of artificial graphite/graphite powder, graphite mold, graphite plate, graphite crucible, graphite electrode, graphite rod and other products. The company carefully crafts every detail of each product to serve the society. Provide very good products and services, sincerely welcome new and old customers to discuss cooperation.