Precision carburizing technology in heat treatment process

The role of precision carburizing technology in heat treatment process

Implementation artifacts precision carburizing, the key lies in the temperature, the carbon potential of furnace to achieve precise control, and realize the online quality control, gas carburizing, carbonitriding) furnace in addition to the effective heating area, furnace temperature uniformity performance requirements should be satisfied, should also be precise control of furnace gas carbon potential in order to achieve precise control of gear surface carbon content, permeability layer depth, surface carbon concentration gradient, and even to satisfy the carbonitriding layer (layer microstructure and deep) on the uniformity of surface hardness and uniformity requirements. The on-line control of heat treatment process can be realized by using oxygen probe as sensor, various types of carbon controller, database and process software suitable for various steels and different carburizing processes.

On the premise of ensuring the uniformity of furnace temperature and accurate control of temperature, carbon potential sensor (such as wuhan huamin oxygen probe) and carbon controller are used for carbon potential control. However, under the conditions of drip atmosphere and direct atmosphere, when the CH4 content in the carburizing atmosphere is high, the use of oxygen probe control alone is likely to produce carbon potential out of control, and the long-term use of oxygen probe will also have deviation, which requires continuous inspection of the accuracy of oxygen probe.

Routine inspection is daily or weekly use of thin steel foil carbon measurement method analysis carbon content, the workload is relatively large. Want to get more exact and the carbon potential of furnace real-time, Wu Hanhua susceptibility of three gas analyzer (portable carburizing verification), for CO, CO2, CH4, O2 atmosphere according to replace the module to achieve a variety of the combined detection of the gas, the product weight is very light, weighing only 3.5 kg, size small, thermal shock protection case as you mention, make it real, random measurement.