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Carbon potential and composition of a neutral controlled atmosphere produced from methane and a nitrogen-oxygen mixture

  • Chemicothermal Treatment
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Metal Science and Heat Treatment Aims and scope

Conclusions

Semiempirical equations were obtained and a simplified method was considered for calculation of the carbon potential of a controlled atmosphere produced from methane and a nitrogen-oxygen mixture (air or commercial grade nitrogen) with different oxygen contents in it. A comparison of the results of calculation of a neutral controlled atmosphere produced from methane or from natural gas of a specific composition shows that the error caused by simplification of the method of calculation may in practice not be revealed with the use of production instruments if the natural gas contains not less than 95% CH4.

With the use of the equations obtained a program was set up and used on a computer for calculation of compositions of controlled atmospheres neutral with respect to steels being treated at different temperatures. The calculation data of neutral controlled atmospheres produced from natural gas and commercial grade nitrogen may be used in introduction of them into heat treatment production and the method of calculation and the equations given may be used for determination of the composition of a neutral controlled atmosphere in heat treatment of alloy steels.

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Authors
  1. N. A. Titov
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Additional information

Gor'kii Polytechnic Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 10–14, June, 1988.

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Titov, N.A. Carbon potential and composition of a neutral controlled atmosphere produced from methane and a nitrogen-oxygen mixture. Met Sci Heat Treat 30, 408–414 (1988). https://doi.org/10.1007/BF00704888

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  • DOI: https://doi.org/10.1007/BF00704888

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