NTN bearing data heat treatment skills

Source: China Bearing Network Time: 2013-02-09

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The NTN bearing treated by bainite austempering has good impact toughness and compressive stress on the outside; whether it is cracking in the inner sleeve during installation; it is still the tendency of the outer edge of the casing to fall off and the inner sleeve to be broken during the operation. The mountain file has a strong enthusiasm for the rubber. Therefore, the average life and reliability of the bearing after isothermal quenching is significantly improved compared with the conventional quenching. This process is widely used in railway bearings, rolling mill bearings and bearings used under special conditions. The process is compared with other life extension methods; the process is simple; the cost is low. In these years; China has developed a new steel gcr18mo bainite quenching special steel; to promote the application of bainite quenching on large-scale bearing parts. Many advantages of the process; experts recommend the use of NTN bearings with poor conditions (large impact load, poor smoothness, etc.) or high reliability; and further study the wear resistance and fatigue life after bainite treatment.
In the 1980s, NTN Bearing Research Institute launched the martensitic stress quenching study of bearing steel; after special carbonitriding and quenching of high carbon chromium bearing steel parts; improving the residual austenite content; Appearance stress condition; greatly improved the carbonitriding of the gearbox; improve the residual austenite content on the surface without reducing the appearance hardness; to improve the fatigue life and reliability of the bearing under the condition of smooth pollution.

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