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Effect of welding heat on the kinetics of phase and structural transformations in chromium-manganese-nickel steels

  • Corrosion-Resistant Steels
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Conclusions

  1. 1.

    With welding heat for test steels 05Kh18G2N5T and 05Kh18G10N5M3F the ratio of their phases and the size of δ-ferrite grains in the zone near the weld are unchanged up to 1000°C. with further heating there is an increase in the δ-ferrite content to 40 and 95%, and grain diameter increases up to 185 and 120 μm respectively. In the cooling branch the amount of δ-ferrite in both steels decreases as a result of separation of secondary austenite.

  2. 2.

    Austenite of steel 05Kh18G2N5T is unstable and during quenching it transforms to martensite. With heating of this steel in the temperature range 600–800°C there is reverse martensitic transformation and as a result of this there is a reduction in the level of microstresses and steel hardness. The magnitude of microstresses for δ-ferrite and austenite in steel 05Kh18G10N5M3F with heating and cooling schedules is unchanged, which points to the high stability and uniformity of phases.

  3. 3.

    Test melts of chromium-manganese-nickel steel with welding heat according to the schedule for the zone near the weld reveal considerable phase composition stability and a reduced tendency towards grain growth than for known steel 08Kh18G8N2T.

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Literature cited

  1. N. I. Kakhovskii, Welding of Stainless Steels [in Russian], Tekhmika, Kiev (1968).

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  3. I. Ya. Sokol, Two-Phase Steels [in Russian], Metallurgiya, Moscow (1974).

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  4. M. A. Khubrikh, G. A. Sal'nikov, Zh. A. Lepilina, and I. I. Zhukova, “Kinetics of phase transformations in steel 08Kh18G8N2T with heating by a welding cycle”, Avtomat. Svarka, No. 4, 21–23 (1986).

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Authors
  1. M. A. Khubrikh
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  2. T. A. Chernyshova
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  3. O. A. Bannykh
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  4. T. S. Kuznetsova
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  5. I. I. Zhukova
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Additional information

A. A. Baikov Institute of Metallurgy, Moscow. Volgograd Polytechnic Institute. Volgograd Pedagogical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 49–52, January, 1989.

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Khubrikh, M.A., Chernyshova, T.A., Bannykh, O.A. et al. Effect of welding heat on the kinetics of phase and structural transformations in chromium-manganese-nickel steels. Met Sci Heat Treat 31, 64–68 (1989). https://doi.org/10.1007/BF00735333

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  • DOI: https://doi.org/10.1007/BF00735333

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