Conclusions
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1.
Formation of ε-phase under isothermal conditions leads to a change in the ratio of phases and correspondingly the mechanical properties of steel G22. The latter develops particularly after thermal cycling treatment.
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2.
The possibility is demonstrated of repeated restoration of the capacity of austenite in steel G22 to undergo isothermal γ → ε-transformation after hardening or stabilizing thermal cycling treatment by the scheme 400 ⇆ 20°C.
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3.
The combination of cold plastic deformation with intermediate heating which provides ε → γ-transformation make it possible to obtain high total deformation which may be used in shaping operations.
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Additional information
Mariupolsk Metallurgical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 9–11, October, 1991.
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Malinov, L.S., Kharlanova, E.Y. & Rapina, Y.A. Formation of ε-phase in manganese steel with isothermal transformation. Met Sci Heat Treat 33, 728–731 (1991). https://doi.org/10.1007/BF00800689
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DOI: https://doi.org/10.1007/BF00800689