Wastewater, waste gas, waste salt, dust, noise and electromagnetic radiation from bearing heat treatment production will cause environmental pollution.To solve the environmental pollution problem of heat treatment and to carry out clean heat treatment (or green heat treatment) is one of the developing directions of heat treatment technology in developed countries.In order to reduce the emission of SO2, CO, CO2, dust and coal cinder, the use of coal as fuel has been basically eliminated, the use of heavy oil is also less and less, the use of light oil is mostly, natural gas is still the most ideal fuel.

The waste heat utilization of combustion furnace has reached a very high degree. The optimization of burner structure and the strict control of air-fuel ratio ensure the premise of reasonable combustion, so that NOx and CO are reduced to a minimum.The use of gas carburizing, carbonitriding and vacuum heat treatment technology instead of salt bath treatment to reduce the pollution of waste salt and toxic substances containing CN-to water sources;Water soluble synthetic quenching oil was used to replace part of quenching oil and biodegradable vegetable oil was used to replace part of mineral oil to reduce oil pollution.

 Precision bearing heat treatment has two meanings: on the one hand, according to the use requirements of parts, materials, structural size, the use of physical metallurgy knowledge and advanced computer simulation and detection technology, optimize the process parameters, achieve the required performance or maximize the potential of the material;On the other hand, the stability of the optimized process is fully guaranteed, so that the product quality dispersion is very small (or zero) and the heat treatment distortion is zero.

 Scientific production and energy management are the most potential factors for the effective use of energy. It is the choice of scientific management to establish a professional bearing thermal treatment plant to ensure full load production and give full play to the equipment capacity.In terms of energy structure of heat treatment, primary energy is preferred.Make full use of waste heat and waste heat;The process with low energy consumption and short cycle is used to replace the process with long cycle and large energy consumption.

 By using protective atmosphere heating instead of oxidizing atmosphere heating to precisely control carbon potential, nitrogen potential of the controlled atmosphere heating, the performance of parts after heat treatment is improved, heat treatment defects such as decarburization, cracks and so on greatly reduced, after the heat treatment of the fine processing retention is reduced, improve the utilization rate of materials and machining efficiency.Vacuum heating quenching, vacuum or low pressure carburizing, nitriding, nitrogen carburizing and boronizing can obviously improve quality, reduce distortion and prolong life.The quality control of heat treatment of FAG bearing parts is the strictest in the whole machinery industry.The heat treatment of bearings has made great progress in the past 20 years or so.