Conclusion
Oxidation and decarburization of ShKh15 steel in the process of annealing can be prevented by using endothermal gas, exo-endothermal atmospheres, and purified exothermal gas with the addition of hydrocarbons. The best atmosphere is the exo-endothermal atmosphere with 0.6–0.7% CO2 in the retort. It is cheap, and its carbon potential can be controlled. Lacking generators of this atmosphere, one can use endothermal gas with the same concentration of CO2.
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Literature cited
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Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 36–38, March, 1976.
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Lyakhovich, L.S., Bord, N.Y., Sheindlin, B.E. et al. Interaction of steel ShKh15 with controlled atmosphere during annealing. Met Sci Heat Treat 18, 227–229 (1976). https://doi.org/10.1007/BF00663482
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DOI: https://doi.org/10.1007/BF00663482