Conclusions
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1.
The cyclic strength in air of structural steel 30KhGSNA with different structures depends on the purity of the metal. The fatigue limit is highest after tempering at 150°C; the difference in the fatigue limits of the pure and impure steel is highest after tempering at 250°C.
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2.
A notch substantially reduces the difference in the fatigue limits of longitudinal samples of the pure and impure steel, but has no effect on the variation of the fatigue limit with the tempering temperature.
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3.
A corrosive medium not only greatly reduces the cyclic strength but also levels the differences in the properties of the pure and impure steel. The optimal tempering temperature in this case is 450°C.
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Literature cited
G. V. Karpenko and A. B. Kuslitskii, FKhMM,3, No. 5 (1967).
V. T. Stepurenko, Investigation of the Corrosion Resistance and Corrosion-Mechanical Strength of Steel 45 [in Russian], Izd. AN UkrSSR, L'vov (1958).
A. B. Kuslitskii, FKhMM,1, No. 2 (1965).
Yu. A. Starovoitov, A. B. Kuslitskii, K. V. Kalugina, and I. V. Kokotailo, FKhMM,2, No. 6 (1966).
A. B. Kuslitskii, A. K. Mindyuk, V. P. Rudenko, and B. F. Ryabov, FKhMM,1, No. 1 (1965).
Additional information
Physicomechanical Institute of the Academy of Sciences UkrSSR; Zlatoust Metallurgical Plant. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 70–71, April, 1969.
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Karpenko, G.V., Stefanov, G.D., Kuslitskii, A.B. et al. The cyclic strength of structural steel in working media. Met Sci Heat Treat 11, 318–320 (1969). https://doi.org/10.1007/BF00653206
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DOI: https://doi.org/10.1007/BF00653206