Sintering Graphite Mold Utilize for Diamond Core Bits

With high degree of graphitization made of ultra-fine particle carbon raw materials have small opening porosity, dense structure, high surface finish, high compressive and flexural strength, high resistivity, and strong oxidation resistance. Features. With these characteristics, the dimensional accuracy, surface finish and surface roughness of the hot-pressed diamond geological drill bit can be ensured.

During the hot pressing process of graphite molds for diamond geological drill bits, the surface finish is required to be as high as possible. Using ordinary fine-grained graphite molds, the surface roughness can only reach about ▽6 (3.2). The graphite mold with ultra-fine particle structure has very small opening pores and the surface roughness can be polished to a mirror surface above ▽10 (0.8).

By utilizing the characteristic of minimal thermal deformation of artificial graphite materials, sintering molds and supports for transistors can be manufactured, which have been widely used and have become an indispensable material for the development of the semiconductor industry. In addition, graphite molds are also used for casting molds for cast iron, durability molds for various non-ferrous metals, molds for casting steel, molds for heat-resistant metals (titanium, zirconium, molybdenum, etc.), and molds for aluminothermic welding molds for welding steel rails. The graphite mold used for hot pressed sintered diamond tools plays a dual role as a heating element and mold support in the manufacturing process of diamond tools. The quality of the graphite mold directly affects the dimensional accuracy and appearance shape of the diamond tool. Hot pressing sintering process requirements: temperature reaches (1000 ± 2) ℃, forming pressure is 16-50 MPa, insulation and pressure holding time is 15-30 minutes, and the environment is in a non vacuum state. Under these operating conditions, it is required that the graphite molds for forming and heating components have conductivity, high electrical resistivity, sufficient mechanical strength, as well as good oxidation resistance and long service life to ensure the dimensional accuracy and excellent performance of diamond tools. At present, the world's major diamond tool manufacturers use graphite mold materials with ultra-fine particle structure, high purity, and high graphitization degree. The average particle size is required to be less than 15 μ m, even less than 10 μ m, and the moderate pore size is less than 2 μ m. The graphite mold made from this carbon raw material has low porosity, dense structure, high surface smoothness, strong oxidation resistance, and an average service life of 30-40 times. Diamond molds require high material 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 its oxidation resistance.

Hot Tags: sintering graphite mold utilize for diamond core bits, China sintering graphite mold utilize for diamond core bits manufacturers, suppliers, factory, graphite low maintenance mould, graphite thermal conductivity mould, graphite rough mould, graphite consistent mould, graphite high precision machining mould, graphite heat resistant mould