Composite materials including nickel-based matrix materials...

C - Chemistry – Metallurgy – 22 – C

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C22C 29/08 (2006.01)

Patent

CA 2621421

An abrasive wear-resistant material includes a matrix and sintered and cast tungsten carbide granules. A device for use in drilling subterranean formations includes a first structure secured to a second structure with a bonding material. An abrasive wear-resistant material covers the bonding material. The first structure may include a drill bit body and the second structure may include a cutting element. A method for applying an abrasive wear-resistant material to a drill bit includes providing a bit, mixing sintered and cast tungsten carbide granules in a matrix material to provide a pre-application material, heating the pre-application material to melt the matrix material, applying the pre-application material to the bit, and solidifying the material. A method for securing a cutting element to a bit body includes providing an abrasive wear-resistant material to a surface of drill bit that covers a brazing alloy disposed between the cutting element and the bit body.

La présente invention concerne un matériau résistant à l~abrasion comprenant une matrice et des granules frittées et coulées de carbure de tungstène. Un dispositif à utiliser pour le forage de formations souterraines comprend une première structure fixée à une seconde structure à l~aide d~un matériau liant. Un matériau résistant à l~abrasion recouvre le matériau liant. La première structure peut comprendre un corps de trépan et la seconde structure peut comprendre un élément de coupe. La présente invention concerne en outre un procédé d~application d~un matériau résistant à l~abrasion sur un trépan, consistant à fournir un trépan, à mélanger les granules frittées et coulées de carbure de tungstène dans un matériau de matrice pour fournir un matériau de pré-application, à chauffer le matériau de pré-application pour faire fondre le matériau de matrice, à appliquer le matériau de pré-application au trépan et à solidifier le matériau. La présente invention concerne également un procédé de fixation d~un élément de coupe à un corps de trépan consistant à disposer un matériau résistant à l~abrasion sur une surface de trépan qui recouvre un alliage de brasage disposé entre l~élément de coupe et le trépan.

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