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Friction of haed alloys in a vacuum at low temperatures

  • Test Methods and Properties of Materials
  • Published:
Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

  1. 1.

    Lowering the temperature decreases the coefficients of friction of hard alloys. This is due to a growth in the resistance to interpenetration of microirregularities in contact, brought about by an increase in the over-all hardness of materials induced by cooling and a decrease in the area of true contact between rubbing materials.

  2. 2.

    The presence of a ductile binder in VK15 hard alloy promotes the formation on the mating surfaces of beads, which lead to local variations in wear intensity, observable even during rubbing after cooling to 98‡K.

  3. 3.

    Cermets differ in their bearing properties from their starting components, which may be ascribed to their structural heterogeneity and phase composition. When a new phase forms in cermets during their preparation, the effect on the friction and wear processes is the more marked the greater the volume occupied by it and the more appreciable the difference in properties between the starting components, as obthe served in the case of a TiC-1Kh18N9T alloy.

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Authors and Affiliations

  1. Institute of Materials Science, Academy of Sciences of the Ukrainian SSR, Ukraine

    M. S. Koval'chenko, V. I. Alekseev & N. N. Sereda

Authors
  1. M. S. Koval'chenko
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  2. V. I. Alekseev
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  3. N. N. Sereda
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Additional information

Translated from Poroshkovaya Metallurgiya, No. 5 (125), pp. 88–93, May, 1973.

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Koval'chenko, M.S., Alekseev, V.I. & Sereda, N.N. Friction of haed alloys in a vacuum at low temperatures. Powder Metall Met Ceram 12, 425–428 (1973). https://doi.org/10.1007/BF00791274

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  • DOI: https://doi.org/10.1007/BF00791274

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