ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 25 January 2011
Page Count: 9

Evaluation of Cutting Edges Made of Nanocrystalline Cemented Carbides Sintered by the Pulse Plasma Method

Kupczyk, Maciej Jan
Institute of Mechanical Technology, Poznan Univ. of Technology, Poznan,

Michalski, Andrzej
Faculty of Materials Science, Warsaw Univ. of Technology, Warsaw,

Siwak, Piotr
Institute of Mechanical Technology, Poznan Univ. of Technology, Poznan,

Rosinski, Marcin
Faculty of Materials Science, Warsaw Univ. of Technology, Warsaw,

(Received 15 July 2010; accepted 3 January 2011)

Abstract

In our investigations, nanocrystalline WC-5 wt % Co was consolidated by the pulse plasma sintering method at various temperatures between 1320 and 1560 K under a pressure of 60 MPa for 300 s. The cemented carbides sintered at 1520 K have a relative density of 100 %, hardness of 2100 HV30, and tungsten carbides (WC) crystallite size of about 150–300 nm. An increase of the sintering temperature to 1560 K results in the increase of the WC crystallite size to about 300–500 nm and the hardness being decreased to 1980 HV30. The tool life of the cutting edges made of nanocrystalline cemented carbides sintered by the pulse plasma method is increased about two times in comparison with cutting edges made of standard and fine-grained cemented carbides during the turning of EN1.45.40 (1H18N9T) austenitic steel.

Keywords:
nanomaterials, cutting edges, pulse plasma sintering method

Paper ID: JAI103258
DOI: 10.1520/JAI103258
ASTM International is a member of CrossRef.