Description

Graphite Chills: generally recommended graphite chills for the density of 1.***1.*5 g/cm3. Parts require drawings. The advantages are as follows: 1. The inner and outer parts of the casting can be cooled as quickly as possible. Due to the large thermal conductivity of graphite chills, heat absorption in a short time on more. The internal and external parts of the casting can be cooled at the same time as soon as possible, which can not only solve the problem of loose texture and shrinkage cavity at the hot spot of the casting, but also make the microstructure of the casting to be more than *5% of fine flake pearlite and the number of eutectic clusters up to ******0 cm, the hardness of the casting can be increased by *0 ~ *0HB, and the surface finish and wear resistance of the casting are improved. Graphite chills are easy to operate. Because the specific gravity of graphite chills is small, about 1/5 of the metal chills, it is portable to carry, and the sand mold (core) is not easy to drop when turning over the box. 3, graphite chills can be reused, low cost. Due to the high refractory degree of graphite chills up to ***0 degrees Celsius, high temperature resistance, there is not easy to oxidation performance. Not only to avoid casting white (cementite) and porosity and other casting defects. Its cold iron material surface is not easy to burn, oxidation, cracking, service life than cast iron and other metal materials cold iron 5 ~ *0 times longer. If the surface is damaged, it can be repaired and reused, so the cost is lower.