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Hardenability of Silicon Nitride Cutting Ceramic and the Influence of Alloying Elements

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An Erratum to this article was published on 01 November 2022

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Abstract

Alloying elements that considerably harden ferrite in the sintering of NKRK-50M silicon nitride cutting ceramic are found to increase the hardness of martensite, but the increase is relatively small. This is confirmed by the influence of manganese and chromium on the hardness of martensite in NKRK-50M cutting ceramic. Large austenite grains increase the hardenability of NKRK-50 ceramic. With increase in grain size from 0.8–1.2 to 2–3 µm, the hardenability of the cutting insert approximately doubles. The hardenability is also characterized by the size of the insert’s critical cross section. There is an approximately linear inverse relationship between the grain size and the square of the insert’s critical cross section. The influence of the grain size on the hardenability is found to be greater in NKRK-50 silicon nitride cutting ceramic than in VOK-60 alumina–carbide cutting ceramic.

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Authors and Affiliations

  1. Armavir Mechanical Technology Institute, Kuban State Technical University, Armavir, Russia

    V. N. Puchkin, I. D. Storozhenko, E. S. Geitsenreder, L. P. Salantii & A. V. Kovalevskaya

  2. Don State Technical University, Rostov-on-Don, Russia

    V. E. Burlakova & I. A. Turkin

Authors
  1. V. N. Puchkin
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  2. I. D. Storozhenko
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  3. E. S. Geitsenreder
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  4. L. P. Salantii
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  5. A. V. Kovalevskaya
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  6. V. E. Burlakova
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  7. I. A. Turkin
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Correspondence to V. N. Puchkin, I. D. Storozhenko or L. P. Salantii.

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Translated by B. Gilbert

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Puchkin, V.N., Storozhenko, I.D., Geitsenreder, E.S. et al. Hardenability of Silicon Nitride Cutting Ceramic and the Influence of Alloying Elements. Russ. Engin. Res. 42, 710–714 (2022). https://doi.org/10.3103/S1068798X22070243

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  • DOI: https://doi.org/10.3103/S1068798X22070243

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