Conclusions
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1.
Natural gas of the origin indicated, without any pretreatment [this is doubted by the Russian editor], is recommended as a carburizer.
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2.
The waste gases can be used as protective atmospheres in heat treating furnaces.
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3.
The use of natural gas for gas carburizing released one of the furnaces and resulted in 57,000 rub. annual saving.
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Berling, A.Z., Lesnykh, D.S. Carburizing with natural gas at the rostsel'mash works. Met Sci Heat Treat 3, 133–134 (1961). https://doi.org/10.1007/BF00810557
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DOI: https://doi.org/10.1007/BF00810557