In the vacuum furnace, in addition to the graphite heating tube being a very important graphite component, the graphite connecting piece is also a very important and special graphite piece. Its main role is to assist the conduction of graphite heating, so that strong current can be smoothly connected to another heating rod. The graphite connecting piece itself does not play a heating role, but its role can not be ignored.
& nbsp;& nbsp;& nbsp;& nbsp; In the production process of the vacuum furnace, graphite components are loved by manufacturers. Graphite materials have won a wide application market with their unique properties. Graphite is often used in vacuum furnaces as: thermal insulation carbon felt, graphite scraper, heating rod, hearth guide rail, guide nozzle, conductive rod, connector, pillar, hearth support, graphite screw, nut and other products.
Thermal insulation carbon felt (soft felt): it has extremely high strength, can be flexibly used for bending, closing hoop and shear reinforcement, and has outstanding fatigue resistance; The self weight of the material is light and the thickness is small. After reinforcement, the thickness of the matrix is basically not increased; It has good flexibility and can wrap complex shapes; It is applicable to various harsh environments such as acid, alkali, chemical corrosion, etc. (it is pollution-free) and meets the requirements of environmental protection.
Heating rod: according to different working conditions, select the most appropriate graphite material to process and make graphite heating rod, and comprehensively consider the use effect, service life, production cost and other factors, so as to achieve the best cost performance ratio of graphite heating rod. It can also selectively carry out antioxidant treatment for graphite heating rods to improve the use effect and prolong the service life.
The furnace bed guide rail has the advantages of graphite: no maintenance, low maintenance, no lubrication of pipeline system and equipment; Super long service life, long-term automatic maintenance of rail surface lubricating oil film protection; Greatly save the cost of lubricating oil; Easy to maintain machine cleaning, no waste oil leakage polluting the environment; High quality, preferential price.
Advantages of graphite elements: 1. Graphite has good high-temperature strength, and the strength of graphite is far worse than that of metal at normal temperature. However, with the increase of temperature, its strength gradually increases, and will exceed all oxides and metals; 2. Graphite is easy to obtain and cheaper than metal. 3. Graphite has some properties of metal and ceramics, such as good conductivity and thermal conductivity, as well as multi porosity and small coefficient of thermal expansion, so it becomes one of the most heat-resistant and shock resistant materials. 4. Graphite has small resistance temperature coefficient and low thermal inertia, which can be heated and cooled quickly. There is no special requirement in the process of workpiece processing, so it is more suitable for the application of vacuum furnace heat generators. 5. It is a relatively good heating element of vacuum furnace, with the advantages of high temperature resistance, no deformation, impact resistance, large radiation area, good flexibility, and easy processing and installation. Electrically, it is easy to make larger heating elements, which can increase voltage and reduce current. Thereby saving heat loss.