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Proneness to hot embrittlement of welded joints in steel 09G2S

Conclusions

  1. 1.

    Welded joints of steel 09G2S after holding for 1000 h at elevated temperatures (340–540°C) are prone to hot embrittlement because of the segregation of deleterious admixtures of type (phosphorus) on the ferrite-carbide interfaces, including the boundaries of lamellar cementite particles contained in colonies of pearlite.

  2. 2.

    The development of hot embrittlement in the metal of the welding seam and in the heat-affected zone of the welded joint of steel 09G2S is accompanied by increased intercrystalline failure in the brittle zones of the fractures of impact test specimens.

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Literature cited

  1. 1.

    L. I. Gladshtein, V. M. Goritskii, and G. R. Shneiderov, "Study of the mechanical properties, the structure and fracture strength of low alloy steels subjected to lengthy thermal holding at 320–450°C," in: Collection of Abstracts of Papers Read at the 9th Scientific and Technical Conference on the Thermal Microscopy of Metallic Materials: Structure and Strength of Metallic Materials in a Broad Temperature Range, Frunze (1980), pp. 128–139.

  2. 2.

    V. M. Goritskii, L. I. Gladshtein, V. N. Orlova, and É. I. Pichii, "Proneness of low-alloy temper hardened steel 12GN2MFAYu to hot embrittlement", Probl. Prochn., No. 1, 103–108 (1982).

  3. 3.

    V. M. Goritskii, "Effect of the parameters of the fine structure of structural steel on the fracture strength under conditions of hot embrittlement," in: Proceedings of the Central Research Institute for the Planning of Steel Structures: Investigation of Brittle Strength of Metallic Building Structures, Moscow (1982), pp. 128–139.

  4. 4.

    V. I. Bogdanov, L. I. Gladshtein, V. M. Goritskii, and G. R. Shneiderov, "The effect of phosphorus, vanadium, and molybdenum on the proneness to hot embrittlement of temper hardened steel 10KhSND", Metalloved. Term. Obrab. Met., No. 9, 16–18 (1979).

  5. 5.

    A. E. Asnis, G. A. Ivashchenko, and Yu. V. Danchenko, "The properties of temper hardened steel 09G2S after double tempering", Metalloved. Term. Obrab. Met., No. 10, 48–49 (1983).

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Additional information

Central Research Institute for the Planning of Steel Structures. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov No. 4, pp. 24–27, April, 1986.

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Goritskii, V.M., Shneiderov, G.R. & Basko, E.M. Proneness to hot embrittlement of welded joints in steel 09G2S. Met Sci Heat Treat 28, 258–261 (1986). https://doi.org/10.1007/BF00707651

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Keywords

  • Phosphorus
  • Welding
  • Brittle
  • Elevated Temperature
  • Test Specimen