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Changes in the dimensions of borided machine parts in the process of heating and cooling

  • Chemicothermal Treatment
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The coefficient of thermal expansion of the boride case differs for different steels and is 1.5–2.0 times lower than that of the base metal.

  2. 2.

    The boride case is capable of elastic deformation under the influence of forces resulting from the expansion of the base metal during heating and the γ→α transformation, and also resulting from shrinkage of the base metal during the α→γ transformation and cooling, and has hardly any effect on the change in the volume of the base metal that occurs.

  3. 3.

    At temperatures below the γ→α transformation the reduction in transformation the reduction in the length of borided samples during cooling practically ceases, which may be due to precipitation of excess boron in the form of Fe2B from the α phase in the transition zone and the redistribution of stresses in the boride case.

  4. 4.

    To reduce deformation of borided parts it is expedient to cool them from boriding temperature at a rate suppressing the precipitation of excess boron from α phase in the transition zone and the unfavorable redistribution of stresses in the boride case.

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Literature cited

  1. F. G. Petrosyan, A. M. Pogosyan, and P. G. Demirchyan, "Effect of boriding conditions on changes in the dimensions of carbon steel machine parts," in: Scientific Reports of the Erevan Polytechnical Institute [in Russian=, (1972), p. 133.

  2. N. N. Nogtev and I. P. Fetisov, "Structure and properties of the boride case," in: Scientific Reports of the Perm Polytechnical Institute [in Russian], No. 107 (1972), p. 117.

  3. B. G. Gurevich and E. A. Govyazina, Electrolytic Boriding of Steel Parts [in Russian], Mashinostroenie, Moscow (1976), p. 70.

    Google Scholar 

  4. M. Deger, M. Riehte, and W. Schaft, Neue Hütte, No. 6, 341 (1972).

    Google Scholar 

  5. H. Kunst, Maschinenmarkt, Wurzburg 80, No. 92, 1898 (1974).

    Google Scholar 

  6. A. P. Épik et al., "Boriding of machine parts and tools in powdered mixtures," Tekhnol. Organiz. Proizvod., No. 2, 69 (1970).

    Google Scholar 

  7. V. G. Permyakov et al., "Dilatometer with automatic recording," Zavod. Lab., No. 3, 279 (1969).

    Google Scholar 

  8. A. N. Minkevich, Chemicothermal Treatment of Metals and Alloys [in Russian], Mashinostroenie, Moscow (1965), p. 490.

    Google Scholar 

  9. V. N. Glukhov, Boride Coatings on Iron and Steels [in Russian], Naukova Dumka, Kiev (1970), p. 208.

    Google Scholar 

  10. G. V. Samsonov et al., "Boriding of punches and dies," in: Chemicothermal Treatment of Metals and Alloys [in Russian], Nauka i Tekhnika, Minsk (1971), p. 104.

    Google Scholar 

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Authors
  1. V. A. Boiko
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  2. G. D. Gabinskaya
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  3. A. P. Épik
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Additional information

Kramatorsk Scientific-Research and Design-Engineering Institute of Machine Construction. Special Structural-Technological Bureau of the Institute of Problems of Material Science, Academy of Sciences of the Ukrainian SSR. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 8–10, January, 1979.

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Boiko, V.A., Gabinskaya, G.D. & Épik, A.P. Changes in the dimensions of borided machine parts in the process of heating and cooling. Met Sci Heat Treat 21, 10–12 (1979). https://doi.org/10.1007/BF00800388

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  • DOI: https://doi.org/10.1007/BF00800388

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