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Introduction to bearing quenching heat treatment technology

The quality of bearing quenching heat treatment is directly related to the subsequent processing quality, which ultimately affects the use performance and life of the parts. At the same time, heat treatment is the major energy consumption and pollution of the machinery industry. In recent years, with the advancement of science and technology and its application in heat treatment, the development of heat treatment technology is mainly reflected in the following aspects:
(1) Wastewater, waste gas, waste salt, dust, noise and electromagnetic radiation generated by the heat treatment of heat treatment will cause environmental pollution. To solve the environmental pollution problem of heat treatment, the implementation of clean heat treatment (or green heat treatment) is one of the development directions of heat treatment technology in developed countries. In order to reduce the emissions of SO2, CO, CO2, dust and cinder, coal has been basically eliminated as a fuel, and the use of heavy oil is also becoming less and less.
 
(2) Precision heat treatment Precision heat treatment has two meanings: on the one hand, according to the use requirements of the parts, materials, structural dimensions, using physical metallurgy knowledge and advanced computer simulation and detection technology to optimize the process parameters to achieve the required performance or Maximize the potential of the material; on the other hand, fully guarantee the stability of the optimized process, achieve a small dispersion of product quality (or zero) and heat treatment distortion to zero.
 
(3) Energy-saving heat treatment Scientific production and energy management are the most promising factors for effective energy utilization. It is a scientific management choice to establish a professional heat treatment plant to ensure full-load production and full use of equipment capabilities. In the heat treatment energy structure, priority is given to primary energy; waste heat and waste heat are fully utilized; and processes with low energy consumption and short cycle are used to replace processes with long cycle and high energy consumption.
 
(4) Less oxidation-free heat treatment is heated by a protective atmosphere heating instead of an oxidizing atmosphere to control the carbon potential and nitrogen potential in a controlled atmosphere. The properties of the parts after heat treatment are improved, and heat treatment defects such as decarburization and cracking are greatly reduced. The subsequent finishing allowance is reduced, which improves material utilization and machining efficiency. Vacuum heating, gas quenching, vacuum or low pressure carburizing, nitriding, nitrocarburizing and boronizing can significantly improve the quality, reduce distortion and improve life. The quality control of heat treatment of bearing parts is more stringent throughout the machinery industry. Bearing heat treatment has made great progress in the past 20 years.
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