In recent years, the introduction of foreign advanced technology and advanced equipment has greatly promoted the development of China's heat treatment technology, which has made China's heat treatment technology a big step forward and shortened the gap with advanced countries. However, the current situation of China's heat treatment industry is still far behind developed countries. At present, most of the foreign heat treatment equipment has adopted gas radiant tubes and fully automatic heat treatment production lines. The country is still in a situation where the equipment is outdated, the process is conservative, the equipment management is backward, the equipment is heavy, and the energy utilization rate is low. Compared with developed countries, under the same energy consumption conditions, its output is more than five times that of China's production. Due to the energy shortage in China, the potential for energy conservation in heat treatment equipment is a necessary measure to save energy.
At present, there is a new energy-saving technology, BH technology, which is suitable for low-temperature rapid carburizing or carbonitriding in various equipments and atmospheres. When using this technology, it is only necessary to use the infiltration agent for appropriate process adjustment. The core of BH is to make a carburizing medium (propane, RX gas, acetone, kerosene, etc.) to produce a part of positive tetravalent carbon ions in the atmosphere by adding a trace amount of infiltration agent in the carburizing atmosphere - positive tetravalent carbon ions (φ0. The volume of 15 nm) is only 1/135 of the volume of carbon ions (φ0.77 nm), so the activity is high, and the diffusion resistance is small and the diffusion speed is fast in austenite.
The main features of BH technology are as follows:
1. Under the condition that the process temperature is lowered by 40 °C or above (≥810 °C), the seepage speed of the workpiece at the original process temperature can be kept unchanged. It can reduce the deformation, reduce the tendency of grain coarsening of the product, and control the martensite level after the direct quenching of the intrinsic coarse grain steel, and significantly extend the life of the equipment and its heat-resistant components.
Second, at the same process temperature, it is more than 20% faster than conventional carburizing or carbonitriding, which can significantly reduce the holding time of the workpiece in the high temperature stage, save electricity costs, improve production efficiency and reduce deformation.
Third, BH technology can improve the activity of carbon in the atmosphere, reduce carbon black, significantly alleviate the problem of relatively more carbon black in the enrichment agent plus air direct atmosphere carburizing, and prolong the life of the oxygen probe.
BH infiltration technology is a new internationally advanced technology successfully developed by Chinese scholars. The success of this technology is a major breakthrough in the history of heat treatment technology. It will have a profound impact on the development of China's future heat treatment technology and provide a favorable platform for China's heat treatment technology to go global.
At present, there is a new energy-saving technology, BH technology, which is suitable for low-temperature rapid carburizing or carbonitriding in various equipments and atmospheres. When using this technology, it is only necessary to use the infiltration agent for appropriate process adjustment. The core of BH is to make a carburizing medium (propane, RX gas, acetone, kerosene, etc.) to produce a part of positive tetravalent carbon ions in the atmosphere by adding a trace amount of infiltration agent in the carburizing atmosphere - positive tetravalent carbon ions (φ0. The volume of 15 nm) is only 1/135 of the volume of carbon ions (φ0.77 nm), so the activity is high, and the diffusion resistance is small and the diffusion speed is fast in austenite.
The main features of BH technology are as follows:
1. Under the condition that the process temperature is lowered by 40 °C or above (≥810 °C), the seepage speed of the workpiece at the original process temperature can be kept unchanged. It can reduce the deformation, reduce the tendency of grain coarsening of the product, and control the martensite level after the direct quenching of the intrinsic coarse grain steel, and significantly extend the life of the equipment and its heat-resistant components.
Second, at the same process temperature, it is more than 20% faster than conventional carburizing or carbonitriding, which can significantly reduce the holding time of the workpiece in the high temperature stage, save electricity costs, improve production efficiency and reduce deformation.
Third, BH technology can improve the activity of carbon in the atmosphere, reduce carbon black, significantly alleviate the problem of relatively more carbon black in the enrichment agent plus air direct atmosphere carburizing, and prolong the life of the oxygen probe.
BH infiltration technology is a new internationally advanced technology successfully developed by Chinese scholars. The success of this technology is a major breakthrough in the history of heat treatment technology. It will have a profound impact on the development of China's future heat treatment technology and provide a favorable platform for China's heat treatment technology to go global.
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