Conclusions
Control of the quenching rate close to the martensite point of passage of a current through the part makes it possible to increase the plastic and toughness properties of steel and decrease the hardening stresses. The proposed hardening method may be widely used in production of constant cross section parts (springs, torsion bars, axles, shafts, etc.).
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Literature cited
USSR Inventors' Certificate No. 1,250, 585, IPC S 21 D 1/56. A Method of Hardening of a Part.
D. I. Romanov, Electrocontact Heating of Metals [in Russian], Mashinostroenie, Moscow (1981).
Additional information
Ural Railroad Car Plant Production Union. Nizhnii Tagil Branch, Ural Polytechnic Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 16–17, June, 1990.
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Bershtein, L.I., Siper, A.S. & Bershtein, Y.L. Regulating the cooling rate in hardening of steels. Met Sci Heat Treat 32, 414–416 (1990). https://doi.org/10.1007/BF01100157
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DOI: https://doi.org/10.1007/BF01100157