Graphite mold materials used for diamond tool manufacturing are mainly graphite materials with ultra-fine particle structure, high purity and high graphitization degree, and their average particle size is required to be less than 15 μ m. Even 10 μ M U.M or less, medium pore size less than 2 μ m。 The graphite mold made of this carbon material has the advantages of small porosity, compact structure, high surface finish and strong oxidation resistance. The average service life can reach 30-40 times.
The electronic sintered graphite mold and support for transistors can be manufactured by using the characteristics of artificial graphite with minimal thermal deformation. It has been widely used and has become an indispensable material for the development of semiconductor industry.
The electronic sintered graphite mold used for hot press sintering diamond tools plays the dual role of heating element and mold support in the manufacturing process of diamond tools. The quality of graphite mold directly affects the dimensional accuracy and appearance shape of diamond tools.
In addition,Graphite mouldIt is also used in cast iron molds, durability molds for various non-ferrous metals, cast steel molds, heat-resistant metals (titanium, zirconium, molybdenum, etc.) molds, and aluminothermic welding molds for rail welding.
Hot press sintering process requirements: the temperature reaches (1000 ± 2) ℃, the forming pressure is 16 ~ 50MPa, the holding time is 15 ~ 30min, and the environment is non vacuum. Under this working condition, the sintered graphite mold for forming and heating elements is required to have conductivity, high resistivity and sufficient mechanical strength, as well as good oxidation resistance and long service life, so as to ensure the dimensional accuracy and excellent performance of diamond tools.
Diamond Mold requires high hardness, good oxidation resistance and high machining accuracy. The use of high-quality graphite raw materials greatly extends the service life of the mold and improves the oxidation resistance