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The Structure and Microhardness of Binding for Diamond Tools Based on Tungsten Carbide Obtained by Impregnation with an Iron–Carbon Melt

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Inorganic Materials: Applied Research Aims and scope

Abstract

Experimental modeling of the technology for producing a matrix by sintering a diamond-containing briquette with a filler consisting of tungsten monocarbide powder impregnated with a Fe–C eutectic melt in vacuum is performed in this work. The microstructure and elemental and phase compositions of the products formed in the process of sintering of the diamond-containing matrix with impregnation with a Fe–C eutectic melt in vacuum are studied by scanning electron microscopy, X-ray microanalysis, X-ray phase analysis, and Raman spectroscopy. It is found that the matrix consists of 61.0% tungsten carbide, 17.0% iron carbide, 16.5% α-Fe, and 5.5% graphite phases. The Fe–C alloy eutectic that acts as a matrix binder consists of a ferrite–pearlite metal base with inclusions of graphite. It is shown that, at the diamond–matrix interface, the graphite inclusions are formed not as a continuous layer but as discontinuous areas along the perimeter of the diamond grains. The microhardness of the WC-based matrix with impregnation with a Fe–C melt is ~11 GPa, which by more than three exceeds the microhardness of a WC–Co–Cu hard-alloy matrix obtained by sintering with impregnation with copper. The obtained results can be used in the development of production technology of wear-resistant matrices for a wide variety of diamond tools used in the processing of materials with a high level of hardness.

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Authors and Affiliations

  1. Larionov Institute of the Physical-Technical Problems of the North, Siberian Branch, Russian Academy of Sciences, Federal Research Centre Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences, 677980, Yakutsk, Republic of Sakha (Yakutia), Russia

    P. P. Sharin, M. P. Akimova & S. P. Yakovleva

  2. Ammosov North-Eastern Federal University, 677000, Yakutsk, Republic of Sakha (Yakutia), Russia

    V. I. Popov

Authors
  1. P. P. Sharin
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  2. M. P. Akimova
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  3. S. P. Yakovleva
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  4. V. I. Popov
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Correspondence to P. P. Sharin or V. I. Popov.

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Translated by E. Boltukhina

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Sharin, P.P., Akimova, M.P., Yakovleva, S.P. et al. The Structure and Microhardness of Binding for Diamond Tools Based on Tungsten Carbide Obtained by Impregnation with an Iron–Carbon Melt. Inorg. Mater. Appl. Res. 12, 1562–1571 (2021). https://doi.org/10.1134/S2075113321060228

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