Non-ferrous metal smelting graphite mold
In recent years, the frequency of use of molds has been increasing, and the requirements for mold shape, processing quality and precision have also increased. In recent years, the mold industry has developed rapidly. Graphite materials, new processes and increasing mold factories continue to impact the mold market. Graphite has gradually become the material of choice for mold making with its good physical and chemical properties. Graphite abrasives are used in the field of non-ferrous metal smelting. Also recognized by people.
Excellent performance of non-ferrous metal smelting graphite mold industry:
1. The use of graphite mold is mainly because of its high temperature resistance. For example, the casting temperature of pure copper is about 1200 degrees. The performance of graphite at this temperature is still stable. The amount of thermal barrier and shrinkage is very small and can be neglected.
2, the lubricity is better, the metal liquid is not easy to bond on the mold during the solidification process. Although the thermal conductivity is relatively poor, it is not necessarily a good thing to have a good cooling effect in casting, so this may become an advantage. Graphite molds are generally used in horizontal continuous casting, because the influence of gravity on solidification is relatively large by this type of casting method, and the horizontal lubrication cannot be performed because of poor lubricity.
Graphite mold application has good performance in the non-ferrous metal smelting industry, but there are some places that we should pay attention to and improve, especially in the process of use: generally only use 1 to 2 weeks, because the molten metal will be on the mold. Residue, accumulated to a certain extent will affect the crystallization, damage the surface quality of the ingot, the graphite plate to be removed needs to be repaired, and some high-quality ingots or even new plates are used in actual production, and the cost is high. And domestically, it is still unable to produce high-quality graphite plates. Most manufacturers rely on imports, generally in Japan and the United States, and the price is high. At present, the processing technology of abrasive tools is constantly improving, and we hope to see effective results in the near future.