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Effect of heat treatment on the strength and tribotechnical properties of material of LNKhB grade

  • Powder Metallurgical Materials, Parts, and Coatings
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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

The Nichrome alloy was alloyed with niobium to produce the materials of the LNKhB7 and LNKhB8 grades with a heterogeneous structure which consist of an alloyed solid solution and nickel and a high-hardness phase, i.e., molybdenum carbide. Heat treatment (normalizing, aging) greatly hardens the material as a result of the formation of the high-hardnessγ′ phase (Ni3Al).

The materials hardened with the high-hardness molybdenum carbide and theγ′ phase have high and stable strength properties in the temperature range 20–700°C (800°C); at temperatures higher than the temperature of hardening heat treatment the strength properties of the materials rapidly decrease.

Alloying the grade LNKhB materials with niobium greatly improves the tribotechnical characteristics as a result of the formation of a surface film in the form of complex compounds on the friction surfaces.

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Literature cited

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Authors and Affiliations

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

    I. D. Radomysel'skii, G. G. L'vova, A. A. Mamonova & V. D. Zozulya

Authors
  1. I. D. Radomysel'skii
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  2. G. G. L'vova
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  3. A. A. Mamonova
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  4. V. D. Zozulya
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Additional information

Translated from Poroshkovaya Metallurgiya, No. 7(283), pp. 74–77, July, 1986.

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Radomysel'skii, I.D., L'vova, G.G., Mamonova, A.A. et al. Effect of heat treatment on the strength and tribotechnical properties of material of LNKhB grade. Powder Metall Met Ceram 25, 594–597 (1986). https://doi.org/10.1007/BF00792370

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  • DOI: https://doi.org/10.1007/BF00792370

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