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Overview of knowledge bearings heat treatment

Date:2012-02-06 From:SKF bearings

  Heat treatment quality stand or fall are directly related to the subsequentprocessing quality and ultimately affect parts of the service performance and life,at the same time, heat treatment and machinery industry, the energy consumption andpollution large large family. In recent years, with the development of scientifictechnology and its application in heat treatment, heat treatment technologydevelopment mainly embodied in the following aspects:
1) clear heat treatment of the formation of the production of heat treatment, wastegas, waste water FeiYan, dust, noise and electromagnetic radiation etc all cancause to the environment pollution. To solve the heat treatment problem of thepollution of the environment, a clean heat treatment (or says the greenenvironmental protection heat treatment) is the developed countries heat treatmenttechnology and its development direction of one. To reduce SO2, CO and CO2, dustand coal emissions, has basically eliminate the use of coal as fuel, heavy oil in the use of less and less to the majority of light oil, natural gas, is still themost ideal fuel. Furnace of waste heat utilization has reached a high degree,burner optimization and empty fuel-than the strict control of the guarantee reasonable under the premise of burning, NOX and CO reduce to lowest level; Use gas
carburizing, carbon and nitrogen were permeability and vacuum heat treatment technology substitution treatment to reduce salt bath containing CN-FeiYan andtoxic substances for water pollution; The synthesis of quenching oil instead of water quenching oil, using biodegradable vegetable oil to replace some mineral oil to reduce oil pollution.
2)Precision heat treatment precision heat treatment two meanings: on the one hand is the use of parts according to requirements, material, structure size, use physical metallurgy knowledge and advanced computer simulation and testing technology, the optimization of process parameters, to the required performance or maximize the potential of materials; On the other hand is fully guarantee the stability of the optimization of process, and realize the product quality dispersion is small (or zero) and heat treatment distortion is zero.
3) energy saving heat treatment of scientific production and energy management is the effective utilization of energy most potential factors, establish a professional hot treatment plant to ensure full load production, give full play to the equipment ability is the choice of scientific management. In terms of energy structure heat treatment, preferred choice a energy; Make full use of waste heat,waste heat; The low energy consumption and short cycle technology instead of cycle is long, energy consumption of technology and so on.
(4) there is no oxidation by using less heat treatment protective atmosphere heating alternative oxidation atmosphere heating to precise control carbon potential, nitrogen potential atmosphere heating controllable, heat treatment parts of the performance improved, heat treatment, such as crack defects, such as decarburization greatly reduce, heat treatment, after finishing a decrease, improve material utilization ratio and machining efficiency. Vacuum add heat quenching, vacuum or low voltage carburizing and seepage nitrogen, carbon and nitrogen of permeability boronizing etc can greatly improve the quality and reduce distortion, improve life.Bearing parts of heat treatment of quality control in the whole machinery industry is the most strict. Bearing heat treatment in the past 20 coming years has made great progress, mainly displays in the following aspects: heat treatment the study of basic theories; Heat treatment process and application of the technology of; The new heat treatment equipment and related technology development.

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