Conclusions
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1.
The wear resistance of carburized and nitrided cases on 18KhGT steel is approximately the same, which is probably the result of the closeness of the hardnesses of these cases.
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2.
For the surface and near-surface zones of the nitrided and carburized cases a higher wear resistance than that of the deeper zones is, as a rule, characteristic.
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3.
The maximum surface pressure for carburized and nitrided cases on 18KhGT steel must be less than 400 MPa. With a pressure of 400 MPa and more seizing of the cases of both types is observed.
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4.
With a certain allowable wear of the parts during service carburized cases on 18KhGT steel may be replaced by nitrided.
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Literature cited
Metals Handbook, Eighth Edition, Vol. 2, Heat Treating, Cleaning, and Finishing, Metals Park, Ohio, p. 150.
E. Stiegler, "Erfahrungen beim Badnitrieren mit Härtol-Nitriersalz W.," Der Maschinenbau, No. 6 (1962).
J. Senatorsky, "Calculation methods for determination of the individual parameters characterizing tests of the resistance to seizing in a system with four rollers," Byul. Inst. Pretsiz. Mekh., No. 8, 36–47 (1970).
Additional information
Polish People's Republic. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 12, pp. 24–27, December, 1986.
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Burakovsky, T., Senatorsky, J. & Tatsikovsky, J. The wear resistance of carburized and nitrided cases. Met Sci Heat Treat 28, 886–890 (1986). https://doi.org/10.1007/BF00706606
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DOI: https://doi.org/10.1007/BF00706606