The hottest foreign bearing heat treatment technol

Foreign bearing heat treatment technology

the quality of heat treatment is directly related to the subsequent processing quality, which ultimately affects the service performance and life of parts. At the same time, heat treatment is a large energy consumption and pollution in the machinery industry. In recent years, with the progress of science and technology and its application in heat treatment, which benefits from the arrival of the holiday sales season and the vigorous export driven by the depreciation of the RMB, the development of heat treatment technology is mainly reflected in the following aspects:

(1) the waste water, waste gas, waste salt, dust, noise and electromagnetic radiation formed by clean heat treatment and heat treatment production will pollute the environment. Solving the environmental pollution problem of heat treatment and implementing 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, the use of coal as fuel has been basically eliminated, and the use of heavy oil is becoming less and less. Most of them use light oil, and natural gas is still the most ideal fuel. The waste heat utilization of the combustion furnace has reached a high degree of landfill and other treatment. The optimization of the burner structure and the strictness of the air-fuel ratio, and its wall thickness is only 25% of the previous generation of connectors. Under the premise of ensuring reasonable combustion, NOx and Co are reduced to the minimum; Using gas carburization, carbonitriding and vacuum heat treatment technology instead of salt bath treatment to reduce the pollution of waste salt and CN toxic substances to water sources; Water soluble synthetic quenching oil is used to replace some quenching oil, and biodegradable vegetable oil is used to replace some mineral oil to reduce oil pollution

(2) precision heat treatment precision heat treatment has two meanings: on the one hand, it uses physical metallurgy knowledge and advanced computer simulation and detection technology to optimize process parameters to achieve the required performance or maximize the potential of materials according to the use requirements, materials and structural dimensions of parts; On the other hand, it is necessary to fully ensure the stability of the optimized process, so that the dispersion of product quality is very small (or zero for products that can be selected according to demand) and the distortion of heat treatment is zero

(3) energy saving heat treatment scientific production and energy management are the most potential factors for the effective utilization of energy. Establishing a professional heat treatment plant to ensure full production and give full play to the equipment capacity is the choice of scientific management. In terms of energy structure of heat treatment, primary energy is preferred; Make full use of waste heat and waste heat; Adopt the process with low energy consumption and short cycle to replace the process with long cycle and high energy consumption

(4) less and no oxidation heat treatment is from using protective atmosphere heating instead of oxidation atmosphere heating to controllable atmosphere heating with accurate control of carbon potential and nitrogen potential. After heat treatment, the performance of parts is improved, heat treatment defects such as decarburization and cracks are greatly reduced, and the finishing allowance after heat treatment is reduced, which improves the utilization rate of materials and machining efficiency. Vacuum heating and gas quenching, vacuum or low-pressure carburizing, nitriding, nitrocarburizing and boriding can significantly improve quality, reduce distortion and improve service life

the heat treatment quality control of bearing parts is the strictest in the whole machinery industry. Bearing heat treatment has made great progress in the past 20 years, mainly in the following aspects: Research on the basic theory of heat treatment; Research on heat treatment process and application technology; Development of new heat treatment equipment and related technologies