Conclusions
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1.
Manganese has much greater effect than nickel on the hardenability of low-carbon steels. Partial substitution of nickel by manganese helps form a martensitic structure at minimal cooling rates.
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2.
The cooling rate from the austenite region has a small effect on the copper content in the solid solution due to the high solubility of this element in austenite, which has high stability.
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3.
The dual heat treatment in the two-phase region (α+γ) helps increase the content of the reverted austenite in the structure of the steel, the maximum amount of which (60–80%) is observed after the first heating in the intercritical range.
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Ural Polytechnic Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 2–4, April, 1993.
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Bronfin, B.M., Pyshmintsev, I.Y. & Kalmykov, V.I. Phase transformations and the structure of high-strength low-carbon steels. Met Sci Heat Treat 35, 187–191 (1993). https://doi.org/10.1007/BF00775134
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DOI: https://doi.org/10.1007/BF00775134