Conclusions
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1.
The conditions were established for rapid spheroidizing annealing of roller bearings made of steel ShKh15 with use of induction heating.
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2.
As compared with the treatments used in bearing factories, the new treatment has the following advantages:
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a)
The spheroidizing annealing time is reduced from 10–20 h to 3 min;
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b)
Conditions are created for mechanization and automation of the heat treatment for roller bearings so that it can be conducted in the production line;
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c)
Rapid annealing of steel ShKh15 with induction heating makes it possible to obtain a highly dispersed structure of sorbite-like pearlite;
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d)
The quality and service life of roller bearings increase due to the more dispersed structure, and decarburization decreases due to rapid induction heating.
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Literature cited
Ya. R. Rauzin, Heat Treatment of Chromium Steels [in Russian], Mashgiz, Moscow (1963).
N. P. Zhitvin and L. I. Krylova, “Selection of equipment for structural annealing of ball bearing steel,” Stal', 165 (1967).
D. I. Tarasko et al., “Annealing plates of ball bearing steel in a continuous roller furnace”, Stal', No. 6, 550 (1971).
G. A. Kashchenko, Fundamentals of Metal Science [in Russian], Mashgiz, Moscow (1956).
N. A. Minkevich, Heat Treatment of Steel and Cast Iron [in Russian], Metallurgizdat, Moscow (1950).
M. I. Vinograd, Heat Treatment of Rolled Shapes. Metal Science and Heat Treatment of Steel and Cast Iron. Handbook [in Russian], Metallurgizdat, Moscow (1956), p. 520.
Additional information
Moscow Evening Metallurgical Institute, All-Union Scientific-Research Institute of the Bearing Industry. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 62–64, January, 1976.
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Shepelyakovskii, K.Z., Spektor, A.G., Kuznetsov, A.N. et al. Rapid spheroidizing annealing of roller bearings with induction heating. Met Sci Heat Treat 18, 78–80 (1976). https://doi.org/10.1007/BF00663758
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DOI: https://doi.org/10.1007/BF00663758