Usually speaking, Graphite
Machining is able to create a wide range of graphite and graphite
composite products for use in industries such as automotive, aerospace,
chemical, metallurgical, nuclear and electronics. Graphite
Machining most commonly utilizes synthetic graphite materials to
fabricate components and products through extrusion and molding. Synthetic
graphite is produced by adding tar pitch and petroleum coke to natural graphite
throughout heat treatments.
As graphite is an abrasive material, and this
ought to be taken into consideration when deciding upon which tools to use
within the machining procedure. For example¡ê?Electrical discharge machining
(EDM), spark machining, as it is so known as, is based on the eroding impact of
an electric spark on each the electrodes used to produce it. EDM (Electric Discharge Machining)
technology can be used to machine complex molds. Nevertheless, it is somewhat
difficult to obtain a complicated graphite electrode with traditional procedure.
Most of manufacturers or graphite producers may have CNC milling and lathe
machinery, also as band, carbon saws and Graphite Heaters. Machined graphite
can easily reveal surface defects created throughout the fabrication procedure,
and therefore it's important to make use of high quality tools and processes.
Compressed air or air circulation systems may be used to help reduce the
quantity of graphite dust inside a manufacturing facility. Much of it's
produced around the tools and work surfaces of Graphite
Machining for electrodes, tubes and rods, and it can produce an
unpleasant working environment. Custom specifications can be met, and graphite
products may be purchased sealed or unsealed. It's a porous material, and
therefore for applications requiring get in touch with with water like graphite
anodes and a few graphite bearings utilizes, sealing the material with a wax,
resin or oil will prove to become a worthwhile investment.
Let’s have a look at the main usage of Machined
graphite in modern industry:
1, utilized as a refractory material: as graphite
and its goods have properties of high - strength, high temperature resistance,
they are primarily utilized to create graphite crucible in the metallurgical
industry, in steelmaking graphite is usually utilized because the protecting
agent of steel ingot, inner lining of metallurgical furnace.
2, conductive material: it can be used for
manufacturing electrode, carbon brush, carbon rod, carbon tube, anode of a
mercury positive flow apparatus, graphite gaskets, phone components, Television
image tube coating in electrical industry.
three, as wear-resistant lubricating material:
Graphite is usually utilized as lubricant in the mechanical business.
four. Graphite has good chemical stability. After
specially processed graphite, it has the characteristics such as corrosion
resistance, great thermal conductivity, low permeability, which is widely
utilized in manufacturing the heat exchanger, reaction tank, condenser, burning
tower, absorption tower, cooler, heater, filter, and pump device. It could also
be extensively utilized in petrochemical, wet metallurgy, acid and alkali
production, synthetic fiber, paper-making and other industrial sectors, saving
a great deal of metal supplies.
five, casting, founding, molding and
high-temperature metallurgical materials: Because of graphite with a rather
little thermal expansivity and the capability of bearing fast quenching and
heat changes, it may be made because the casting mold from the glass, following
graphite being used, black metal may be obtained the precise casting size,
smooth surface and high yield, without being processed or minor processing it
may be used, so a great deal of metal may be saved.
6, utilized within the atomic power industry and
defense industry: as graphite features a good neutron reducer, it can be
utilized in an atomic reactor, uranium and graphite reactor is an atomic
reactor currently applied much more right now. Because the reduction material
of energy in the atomic energy reactor, it ought to possess a higher melting
point, stability, corrosion resistance, and graphite can meet the
above-mentioned specifications. As the graphite purity used within the nuclear
reactor features a extremely higher requirement, the impurity content material
ought to not exceed several dozen PPM. In specific, the boron content should be
less than 0.5PPM. In the defense business, graphite is utilized to manufacture
the nozzle of a strong fuel rocket, nose cone of a missile, cosmic navigation
equipment components, heat insulating material and anti-ray material.
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