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

Elodie Lefort-Sorlier; Christophe Colin; Alfazazi Dourfaye

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

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 83-86Gradation Process by Imbibition in WC-Co for...

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

Abstract:

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.

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Periodical:

Advanced Materials Research (Volumes 83-86)

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810-817

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.83-86.810

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Online since:

December 2009

Authors:

Elodie Lefort-Sorlier, Christophe Colin, Alfazazi Dourfaye

Keywords:

Cutter, Functionally Graded Material (FGM), Imbibition, WC-Co

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