Silicon carbide ceramic are used in the mechanical and chemical industries to produce a new generation of mechanical sealing materials, sliding bearings, corrosion-resistant pipes, valve blades and fan blades. Especially as a mechanical seal material has been internationally recognized as the fourth generation of basic materials since metal, alumina, carbide, its resistance to acid and alkali compared with other materials is extremely good, almost no material can be compared with it. Using the high thermal conductivity of silicon carbide ceramic, it can be used for high temperature heat exchangers in metallurgical furnaces, and the temperature can be up to 1300 ℃; using silicon carbide sand rollers to grind rice can improve the quality of rice compared with other sand rollers, and the rice yield can be increased by 1 % to 2 %, and the cost can be reduced by 30 % to 40 %. Using electroplating method to coat silicon carbide powder on the impeller of hydraulic turbine can greatly improve the wear resistance of the impeller and extend its maintenance cycle. The use of mechanical pressure to press cubic silicon carbide powder and W28 micronized powder into the cylinder wall of an internal combustion engine can extend the service life of the cylinder block by more than one time. The use of silicon carbide and borax mixture on the surface of 45# steel harvester blade boron chemical heat treatment, the boron layer can be made to reach the hardness of the microhardness of 1 800 ~ 2 000 . Rollers made of silicon carbide have been successfully used in steel rolling mills, which have better heat resistance and wear resistance than metal rollers, and can improve the quality of the rolled steel. With silicon carbide materials made of sand pumps and hydrocyclones, with very good wear resistance; with silicon carbide materials made of cylinder liner and other wear-resistant parts can be widely used in petroleum and chemical industries such as machinery; can also be used as high-temperature thermal machinery materials. Silicon carbide ceramic has good high temperature characteristics, such as high temperature oxidation, high temperature strength, creep, good thermal conductivity and low density, is preferred for high temperature parts of thermal machinery, such as: for high temperature combustion turbine combustion chamber, turbine static blade, high temperature nozzle, etc.. Made of silicon carbide piston and cylinder liner for non-lubricant non-cooling diesel engine, can reduce friction 30 % to 50 %, noise significantly reduced.
silicon carbide ceramic as wear resistant and high temperature parts
- by admin