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Effect of electrospark alloying on the wear resistance of cutting inserts made of VK8 alloy

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Powder Metallurgy and Metal Ceramics Aims and scope

Abstract

The paper presents the results from x-ray phase analysis and wear-resistance tests (discontinuous cutting) of cutting inserts made of VK8 (WC-8% Co) hard alloy. The inserts have an electrosparkdeposited coating based on the AlN-Ti/ZrB2 system with Ti/ZrSi2 additions and the TiN-AlN system. These results allow one to infer the possible causes of different wear resistance of cutting inserts with electrospark-deposited coatings. Among such causes are intensive oxidation of titanium (unlike zirconium) during electrospark alloying followed by the formation of brittle oxide phases and the shielding effect of ZrO2 (it prevents globules from destruction during both alloying and service).

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Authors and Affiliations

  1. Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev

    O. V. Stepanova, I. A. Podchernyaeva, A. D. Panasyuk, I. V. Uvarova, I. I. Timofeeva & A. A. Rogozinskaya

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  1. O. V. Stepanova
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  2. I. A. Podchernyaeva
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  3. A. D. Panasyuk
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  4. I. V. Uvarova
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  5. I. I. Timofeeva
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  6. A. A. Rogozinskaya
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__________

Translated from Poroshkovaya Metallurgiya, Vol. 46, No. 11–12 (458), pp. 29–34, 2007.

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Stepanova, O.V., Podchernyaeva, I.A., Panasyuk, A.D. et al. Effect of electrospark alloying on the wear resistance of cutting inserts made of VK8 alloy. Powder Metall Met Ceram 46, 539–542 (2007). https://doi.org/10.1007/s11106-007-0083-8

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  • DOI: https://doi.org/10.1007/s11106-007-0083-8

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