The waste heat utilization of the 6202 ball bearing furnace has reached a high level. studied the microstructure and mechanical properties of SUJ2 bearing steel after cyclic heat treatment: first heat it to 1000°C for 0. A lot of research on this has been done at home and abroad, and many measures to control deformation have been proposed, such as the use of rotary quenching, die quenching, and control of the oil entering of parts.

The heat treatment quality control of bearing parts is the most stringent in the entire machinery industry. Lübben et al.3%, the martensite is mainly lath martensite with a dislocation substructure; when the matrix carbon content is higher than 0. Under the action of contact stress, its performance needs to be further studied, but it can be inferred that its contact fatigue performance should be better than conventional quenching. Lowisch et al. (2)

Precision heat treatment Precision heat treatment has two meanings: on the one hand, it is based on the use requirements, materials, and structural dimensions of the parts, using physical metallurgy knowledge and advanced computer simulation and testing techniques to optimize process parameters to achieve the required performance or Maximize the potential of the material; on the other hand, fully ensure the stability of the optimized process, and achieve a small (or zero) product quality dispersion and zero heat treatment distortion. Such as the shape and size of the part,

the uniformity of the original structure, the rough machining state before quenching (the size of the feed during turning, the residual stress of machining, etc. (4) Less and no-oxidizing heat treatment by using protective atmosphere heating instead of oxidizing atmosphere heating to controllable atmosphere heating with precise control of carbon potential and nitrogen potential. After being austenitized at 820℃,

bearing steel is subjected to short-time hierarchical isothermal air cooling at 250℃, and then tempered at 180℃, which can make the carbon concentration distribution in the martensite after quenching more uniform, and the impact toughness is better than conventional quenching and tempering Doubled.

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