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Low-temperature cyaniding of tool steels

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Conclusions

  1. 1.

    It is expedient to use low-temperature cyaniding to increase the service life of tools manufactured from steels 4Kh4M2VFS, 3Kh2V8F, Kh12M, R18, R6M3, and R6M5.

  2. 2.

    The following cyaniding conditions are recommended for high-alloy tool steels: 560\2-600\dg for 1\2-3 h for steels 3Kh2V8F and 4Kh4M2VFS (DI-22); 540\2-560\dg, 1\2-3 h, for steel Kh12M; 560\2-580\dg, 5\2-60 min, for steels R18 and R6M3.

    Cyaniding under these conditions makes it possible to obtain a high-quality case 0.030–0.15 mm deep with a surface hardness H200=1075–1400.

  3. 3.

    Tests of the wear resistance, scoring resistance, heat resistance, red hardness, and fatigue resistance showed substantial improvements in these properties after cyaniding.

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Literature cited

  1. 1.

    G. N. Neustroev and V. V. Bogdanov, "Low-temperature cyaniding of structural steels," Metal. i Term. Obrabotka Metal., 10, 45–49 (1970).

  2. 2.

    A. N. Minkevich and G. Suchevyanu, "Chemicothermal treatment of steels in salt mixtures containing urea," Metal. i Term. Obrabotka Metal., 10, 11–16 (1968).

  3. 3.

    S. A. Yancheva, "Investigation of tool steels after low-temperature cyaniding," in: Scientific Reports of the Higher Institute of Machine Construction, Mechanization, and Electrification of Agriculture (VMEI) [in Russian], Vol. 12, No. 2, Varna (1970), pp. 67–73.

  4. 4.

    V. V. Vinogradov, G. M. Sorokin, and G. K. Shreiberg, "Method of testing wear during impact with an abrasive surface," Zavod. Lab.,32, 11, 1407–1409 (1966).

  5. 5.

    A. V. Ratner, Equipment for Superheated Steam [in Russian], Énergiya, Moscow-Leningrad (1965).

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Additional information

Moscow Highway Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 12, pp. 27–31, December, 1973.

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Lakhtin, Y.M., Neustroev, G.N. & Ivanov, Y.P. Low-temperature cyaniding of tool steels. Met Sci Heat Treat 15, 1047–1050 (1973). https://doi.org/10.1007/BF00651744

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Keywords

  • Fatigue
  • Wear Resistance
  • Service Life
  • Heat Resistance
  • Substantial Improvement