Atmospheric carburization is a carburizing operation process in which a workpiece is placed in a closed carburizing furnace, and a carburizing medium is decomposed at a high temperature to decompose activated carbon atoms and penetrate the surface of the workpiece to obtain a high carbon surface layer. As a conventional carburizing, carburizing atmosphere having a mature technology, low cost, and therefore application of a very wide field of heat treatment, especially common in applications without blind hole in the carburizing. The surface of the carburized workpiece can achieve high hardness, which improves the wear resistance of the workpiece.
   In practical applications, many people will encounter a type of problem: the carbon concentration in the carburizing process is not easy to control, the carbon concentration is too low, the surface of the workpiece does not reach the expected hardness, and the carbon concentration is too high, so that carbon black appears on the surface of the workpiece , and A large amount of carbon is accumulated in the furnace . Today, we'll take you to know atmosphere carburizing technology from Linde of Germany under. Carburizing atmosphere for different segments, Linde launched a series of flexible process optimization technology, which replace the fan C ARBOJET ® and CARBOTHAN ® nitrogen - methanol atmosphere system can be described as star technology.
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CARBOJET ® Technology Solutions
CARBOJET is Linde's patented technology for improving gas convection conditions in fanless heat treatment furnaces. The special nozzle is used to inject a single or mixed gas into the furnace at a high speed , and the injected gas is better mixed with the furnace atmosphere to improve the gas flow in the furnace , thereby ensuring uniform gas and temperature distribution, improving the utilization rate of the carburizing gas, and effectively improving. The uniformity of the carburized surface also reduces the carbon black production .
CARBOJET is used in a wide range of applications for neutral annealing, carburizing continuous furnaces, and for pit furnaces using nitrogen or natural gas + nitrogen mixed gases. For continuous furnaces , C ARBOJET allows the atmosphere to be evenly distributed around the workpiece to be treated for more uniform carburization , and by improving convection, the heat transfer effect is better, the equipment production efficiency can be increased by 10 % ; in the cooling zone , the production efficiency can also be significant. Increase by 35 %. This technology is especially useful for pit furnaces. The CARBOJET technology can simplify the design of the furnace cover , eliminate the installation cost and maintenance cost of the fan and related accessories , and also increase the utilization efficiency of the furnace space by 20 % , and let the temperature and temperature The carbon potential distribution is more uniform and more efficient .
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CARBOTHAN ® Technology Solutions
   CARBOTHAN ® is a nitrogen -methanol based atmosphere system that uses a high-pressure nitrogen gas to atomize liquid methanol through a special nozzle and spray it into the furnace to produce a uniform and stable carburizing atmosphere for effective carburizing of the workpiece. The atmosphere system includes nitrogen and methanol supplies, nitrogen and formaldehyde storage tanks, supply lines, pressure / flow regulation, safety interlocks, automated controls, and remote controls.
   The advantages of the CARBOTAHN nitrogen-methanol atmosphere system are obvious, low dew point, low energy consumption, high flexibility , and a safe gas supply and gas distribution system to reduce downtime . Atmosphere adjusting time is short, carbon black and reducing the quenching and tempering step of oxidation generated. Improve the carbon efficiency of methanol by nitrogen atomized liquid methanol while also avoiding contamination of the workpiece is low. Another reason why CARBOTHAN is being sought after is energy saving and emission reduction . To replace conventional liquid methanol as the carburizing gas medium, avoiding the carbon dioxide content of the natural gas fluctuations, increase gas utilization efficiency, but also for an exhaust gas got rid of excess combustion process. Gas consumption can also be reduced when emptying the furnace . C ARBOTHAN can also be used in conjunction with CARBOJET technology, comprehensive advantages brought more significant.
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