Graphite components for vacuum furnace

Graphite components for vacuum furnace

Vacuum furnace graphite parts are mainly composed of thermal insulation carbon felt, heating rod, hearth guide rail, guide nozzle, connector, pillar, hearth support, graphite screw, nut, heater block, power rod, vent pipe, nozzle and other graphite parts.

Why high purity graphite is used in vacuum furnace:

1. Graphite has good high-temperature strength. At room temperature, the strength of graphite is much worse than that of metal, but its strength increases gradually with the increase of temperature, which will exceed all oxides and metals;

2. Graphite is easy to obtain and cheaper than metal

3. Graphite has some properties of metals and ceramics, good electrical and thermal conductivity, multi porosity and small coefficient of thermal expansion. Therefore, graphite has become one of the most heat-resistant and shock-resistant materials

4. Graphite has small resistance temperature coefficient and low thermal inertia. It can be heated and cooled quickly. It has no special requirements in the process of workpiece treatment. It is more suitable for the application of vacuum furnace heat generator.

5. It is a relatively good heating body of vacuum furnace. It has the advantages of high temperature resistance, no deformation, impact resistance, large radiation area, good flexibility and easy processing and installation. In terms of electricity, it is easy to make large heating elements, which can increase the voltage and reduce the current. Thus, the heat loss is saved.