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METALWORKING EQUIPMENT AND TOOLS

A significant difference was noted in
the nature of chip formation when turning
with cutters with inserts obtained by SPS,
and cutters with standard inserts after 3
minutes of their work. Continuous turning
with an insert obtained by SPS for 11 minutes
was characterized by overflowing chips,
which can be explained by a large amount
of heat going into the chips, which led to an
increase in its ductility. This indicates that,
due to its low thermal conductivity, an alloy similar in composition to the VK6 hard alloy and
manufactured by spark plasma sintering is not suitable for finishing turning of structural steels,
but can be used for machining gray cast irons.
Wear resistance of the cutting part of cutters made by spark plasma sintering from billets
made from a mixture of nanopowders, including 94 wt % WC and 6 weight percent Co, increases
depending on the growth of the sintering temperature in the temperature range from 1100 to
1500 °C at a pressure of 40 MPa, which may be associated with an increase in the hardness of
the billets with an increase in the sintering temperature.

A.R. Maslov, Dr. Sc., Professor of the Department of Highly Effective
processing technologies MSTU STANKIN

Literature:
1. Borovskiy G.V., Grigoriev S.N., Maslov A.R. edited by A.R. Maslov, 2nd ed., add. and corrected.) // Moscow: Mechanical
Engineering, 2007. 464 p.
2. Maslov A.R. Modern grades of hard alloys for cutting difficult-to-machine materials. Vestnik MGTU Stankin, No. 4/2014, pp.
27 - 30.
3. Yushin D. I. Spark Plasma Sintering of Cutting Plates (D. I. Yushin, V. Smirnov, N. Solis Pinargote ets.) // Russian
Engineering Research. 2016. Vol. 36. pp. 410 - 414.
4. K. Hwan-Cheol. Consolidation of ultra-fine WC-Hard materials 6% Co by SPS method and their mechanical properties (K.
Hwan-Cheol, S. In-Jin, Y. Jin-Kook ets.) // Journal of Ceramic Processing Research. 2011. Vol. 12.No. 3. pp. 304 - 309.
5. Wang Xingqing. Microstructure modifications and phase transformation in plasma-sprayed WC – Co coatings following
post-spray spark plasma sintering (Wang Xingqing, Xie Hongfang, Guo Hailiang etc. // Surface & Coatings Technology. 2005.
No. 194. pp. 96 - 102.
6. Maslov AR, Pristinsky Yu. O., Smirnov A. Characteristics of innovative cutting materials obtained by the method of spark
plasma sintering // Vestnik MGTU Stankin, 2017. No. 2 (41). pp. 52 - 55.

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