Technology for low-temperature carbonitriding combined with high temperature tempering of cold-worked die steel 6Kh4M2FS (DI55) is proposed. The high efficiency of a paste-like coating based on amorphous carbon and nitrogen-containing components (carbamide and potassium ferricyanide) during die steel cyaniding in the temperature range from 500 to 580°C is demonstrated. The effect of thermochemical treatment regimes on diffusion layers formed on steel, their phase composition, and properties is investigated.
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Notes
Friction path Sfr = πdspe × n × 60 (where dspe = 0.05 m, i.e. specimen diameter; n is specimen rotation frequency 1000 rpm; test duration time 60 min); then Sfr = 3.14 × 0.05 × 1000 × 60 = 9420 m.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 35 – 40, May, 2020.
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Kostin, N.A. Pack Cyaniding of Steel 6Kh4M2FS in Order to Increase Heavily-Loaded Die Durability. Met Sci Heat Treat 62, 331–335 (2020). https://doi.org/10.1007/s11041-020-00565-6
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DOI: https://doi.org/10.1007/s11041-020-00565-6