Gradation Process by Imbibition in WC-Co for Mining Tools Application

Abstract:

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Continuous composition gradients of several millimetres were generated in commercial WC-Co cutters to improve their shock resistance. This important gradation was obtained in one-step by using the imbibition process. The effects of this thermal processing were analysed in terms of microhardness, cobalt concentration and WC grain size. A gradient of a 300 HV amplitude is measured in the 8 mm-height sample treated by the imbibition process in association with a boron-rich coating. This gradient was preserved after the HPHT (high pressure – high temperature) step used for the diamond table deposition on the WC-Co cutter. To our knowledge, such gradients have never before been reported and should certainly increase cutter service life.

Info:

Periodical:

Advanced Materials Research (Volumes 83-86)

Edited by:

M. S. J. Hashmi, B. S. Yilbas and S. Naher

Pages:

810-817

DOI:

10.4028/www.scientific.net/AMR.83-86.810

Citation:

E. Lefort-Sorlier et al., "Gradation Process by Imbibition in WC-Co for Mining Tools Application", Advanced Materials Research, Vols. 83-86, pp. 810-817, 2010

Online since:

December 2009

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Price:

$35.00

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