2009
DOI: 10.4028/www.scientific.net/amr.83-86.810
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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 aft… Show more

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“…This study focuses on PDC cutters made by the imbibition process first introduced by Lisovsky [10]. As presented by Lefort-Sorlier et al [11], this process consists on a gradual enrichment of cobalt in the WC-Co substrate. These authors associated to the imbibition process a boron nitride reactive coating on the substrates forming borides WCoB at the PDC/WC-Co interface [12,13].…”
Section: Introductionmentioning
confidence: 99%
“…This study focuses on PDC cutters made by the imbibition process first introduced by Lisovsky [10]. As presented by Lefort-Sorlier et al [11], this process consists on a gradual enrichment of cobalt in the WC-Co substrate. These authors associated to the imbibition process a boron nitride reactive coating on the substrates forming borides WCoB at the PDC/WC-Co interface [12,13].…”
Section: Introductionmentioning
confidence: 99%