Conclusions
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1.
Raising the molybdenum content from 0.9 to 3.7% in austenitic steel with 19% Cr, 10% Mn, 7% Ni, and 0.30% N raises the ultimate strength to 93 kg/mm2 and the yield strength to 58 kg/mm2.
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2.
In the steel not containing molybdenum, tempering at 800°C leads to the formation of M2N and M23C6; the addition of molybdenum in amounts over 2.1% leads to preferential formation of σ phase during tempering.
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3.
Raising the carbon content from 0.01 to 0.11% lessens the tendency to form σ phase in austenitic steel with 2.5% Mo and leads to formation of M23C6 carbide.
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Literature cited
A. A. Babakov et al., “Effect of nitrogen on the properties of Cr-Ni-Mn steel with Mo at low temperatures” in: Special Steels and Alloys [in Russian], Transactions of the Central Scientific-Research Institute of Ferrous Metallurgy, No. 77 (1970), pp. 113–116.
E. A. Ul'yanin et al., “Effect of carbon on mechanical properties of austenitic steel at low temperatures” Metal. i Term. Obrabotka Metal., 5, 26–27 (1966).
H. Wiegand and M. Doruk, Arch. Eisenhüttenw.,33, 559–566 (1962).
Additional information
Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 12, pp. 27–30, December, 1974.
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Sorokina, N.A., Ul'yanin, E.A., Fedorova, V.I. et al. Structure and properties of stainless steel alloyed with molybdenum. Met Sci Heat Treat 16, 1027–1030 (1974). https://doi.org/10.1007/BF00664042
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DOI: https://doi.org/10.1007/BF00664042