Conclusions
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1.
Low-temperature thermomechanical treatment of steels alloyed with elements inducing secondary hardening during tempering increases the strength at 300–500°C. We have shown the possibility, in principle, of reaching a yield strength of about 200 kg/mm2 at 500°C and about 250 kg/mm2 at 330°C.
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2.
High-temperature thermomechanical treatment leads to a smaller increase in the strength of the steel than low-temperature thermomechanical treatment. However, the resulting ductility is higher, and therefore in some cases it is logical to use double tempering of steels which undergo secondary martensitic transformation.
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Additional information
Central Scientific Research Institute of Ferrous Metallurgy Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 19–21, April, 1966
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Bashchenko, A.P., Gurevich, Y.B., Kogan, L.I. et al. Investigation of steels susceptible to secondary hardening and hardening by thermomechanical treatment. Met Sci Heat Treat 8, 266–268 (1966). https://doi.org/10.1007/BF00663129
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DOI: https://doi.org/10.1007/BF00663129