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Influence of heating in a hydrogen containing atmosphere on the mechanical properties and character of fracture of steels in the high-strength condition

  • Constructional Steels
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The use of an endogas atmosphere for heating for hardening is desirable for steels used in the high-temperature tempered condition.

  2. 2.

    For steels which are used in the low-temperature tempered condition after hardening with heating in an endogas atmosphere the length of the low-temperature temper must be increased sharply for the purpose of providing desorption of the diffusion mobile hydrogen and restoration of plasticity of the metal.

  3. 3.

    The presence of characteristic light spots in the fractures of tensile specimens in combination with a reduced reduction in area (with satisfactory impact strength) is the result of increased hydrogen impregnation of the steel.

  4. 4.

    The microstructure of the surface of light spots occurring in the fractures of hydrogen-impregnated steels during deformation depends upon the type of structure and is determined by the character of the most effective sources of the occurrence of stress concentration for the given structure.

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Literature cited

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  3. V. E. Vinogradov, M. A. Khudenko, and S. Z. Kupryakhiya, “Fractographic investigation of the ‘light spots’ in axial seamless rolled steel,” Izv. Vyssh. Uchebn. Zaved., Chern. Met., No. 9, 127–131 (1981).

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Authors
  1. M. A. Balter
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  2. L. Ya. Gol'dshtein
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  3. S. I. Aksenova
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 10–12, February, 1984.

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Balter, M.A., Gol'dshtein, L.Y. & Aksenova, S.I. Influence of heating in a hydrogen containing atmosphere on the mechanical properties and character of fracture of steels in the high-strength condition. Met Sci Heat Treat 26, 102–105 (1984). https://doi.org/10.1007/BF00707155

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  • DOI: https://doi.org/10.1007/BF00707155

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