Pressureless Sintered Silicon Carbide Ceramic Bearings

Non-pressure sintered silicon carbide ceramics with granulation powder, its fluidity ≤ 20s/30g, bulk density 0.75-0.85g/cm3, water content <1.0%, and contains a variety of sintering and molding additives, can be directly pressed and molded and is suitable for automatic dry molding, hydraulic molding and isostatic molding, sintering density of up to 3.10 or more, sintered high hardness, wear resistance, high temperature resistance, resistance to strong acids, strong alkali corrosion and low friction coefficient and has good self-lubricating properties, high thermal conductivity, low thermal expansion coefficient and good strength at high temperatures, It is characterized by high hardness, good abrasion resistance, high temperature resistance, resistance to strong acid and alkali corrosion and low coefficient of friction, etc. It also has good self-lubrication, high thermal conductivity, low coefficient of thermal expansion and good high temperature strength.

No pressure sintered silicon carbide granulation powder, granulation powder particle morphology, due to the use of centrifugal spray granulation, granulation powder particle morphology presents a complete spherical, narrow and uniform particle distribution range, improved fluidity performance, used in the production of silicone carbide ceramic sealing rings, bushings, silicone carbide anti-ballistic sheet, plate and other special ceramic products, the use of vacuum sintering, the sintering temperature of more than 2,100 degrees Celsius, the ceramic density reaches 3.15g/cm3 The ceramic density reaches 3.15g/cm3 and the ceramic hardness reaches Vickers 3000-3600.

Higher limiting speed of pressureless sintered silicon carbide ceramic bearings: ceramics are lighter than steel, which reduces the centrifugal force, thus increasing the limiting speed under the same precision. High precision applications: Silicon carbide ceramic have higher hardness and Young’s modulus than steel, and under the same load, the mechanical deformation is smaller, which can be used in more precise applications. Longer service life: can be 5 times longer than steel bearings, ceramic is lighter than steel, under the same load, the bearing running centrifugal force is reduced, the raceway load is reduced, and because the coefficient of friction of ceramics is smaller than that of steel, so it can reduce the running temperature, reduce the wear and tear, and prolong the service life of the raceway. Can be used in higher temperatures: ceramic materials can be used in high-temperature areas because they can maintain their mechanical properties stably at high temperatures. More suitable for temperature changes: Since the coefficient of thermal expansion of ceramic is smaller than that of steel, the clearance of ceramic bearings is less affected by temperature changes than that of steel bearings, thus they can be used in a wider range of temperature fluctuations. Better anti-seize and anti-seize performance: This is due to the fact that the coefficient of thermal expansion of ceramic is smaller than that of steel, which helps to minimize thermal deformation, thus improving anti-seize capability. Can work without oil: ceramics have self-lubricating properties and can also be lubricated using a medium, so they can be used in high-vacuum applications to prevent contamination from lubricating grease. Resistant to acid, alkali, salt corrosion: therefore can be applied to chemical corrosion occasions, and this is also the ceramic ball bearing future market application is greater, need to vigorously strengthen the development of the field. Can be used in magnetic environment: ceramic non-magnetic, magnetic foreign matter or abrasive particles are not easy to adhere to the groove, can reduce abrasive wear.

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