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Characteristics of alloying and phase composition of nitrided austenitic steel 03Kh17N8G5MFAB

  • Stainless Steels
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Austenitic stainless steel 03Kh17N8G5MFAB was developed for nitrided precision friction parts and also the optimal heat treatment. The steel has a stable austenitic structure at low temperatures and high stresses.

  2. 2.

    The optimal nitriding conditions for steel 03Kh17N8G5MFAB are 600–620° for 30 h with 30–40% dissociation of ammonia. After this treatment the case depth is 0.22 mm, the hardness HV5∼800–900, and the case is corrosion resistant down to a depth amounting to ∼50% of the total case depth.

  3. 3.

    Carbon promotes formation of γ′ phase in the surface zone of the case, stabilizes austenite, and reduces the overall case depth. The high concentration of carbon in austenite and γ′ phase may be one of the reasons for the low corrosion resistance of the surface zone of the case on steels with 0.05–0.08% C.

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Literature cited

  1. G. P. Alekseeva et al., "Stability of austenite in steels for nitrided precision parts," Metalloved. Term. Obrab. Met., No. 2, 47 (1975).

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  2. V. D. Yakhnina and T. F. Meshcherinova, "Formation of the nitrided case in low-carbon stainless steels," Metalloved. Term. Obrab. Met., No. 3, 9 (1973).

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  3. A. G. Andreeva et al., "Phase analysis of nitrided steels," in: Phase Composition, Structure, and Properties of Alloy Steels and Alloys [in Russian], Mashinostroenie, Moscow (1965).

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  4. G. S. Krivonogov, "Use of an electronic measuring unit in a magnetometer," Zavod. Lab., No. 10, 1290 (1972).

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Authors
  1. G. P. Alekseeva
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  2. G. S. Krivonogov
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  3. Yu. Yu. Cherkis
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Additional information

All-Union Institute of Aviation Materials. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 19–23, January, 1979.

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Alekseeva, G.P., Krivonogov, G.S. & Cherkis, Y.Y. Characteristics of alloying and phase composition of nitrided austenitic steel 03Kh17N8G5MFAB. Met Sci Heat Treat 21, 23–27 (1979). https://doi.org/10.1007/BF00800392

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  • DOI: https://doi.org/10.1007/BF00800392

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