Hardfacing materials with highly conforming properties

E - Fixed Constructions – 21 – B

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E21B 10/46 (2006.01) B23K 35/30 (2006.01) C22C 38/22 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2630433

An earth-boring bit, and a method of increasing the durability of the same, which includes the step providing a pliable sheet of a hardfacing matrix material. The pliable sheet of hardfacing material has a nickel and chromium matrix combined with a first element. The first element is selected from a group consisting of spherical sintered tungsten carbide, spherical cast tungsten carbide, and metallic glass. The hardfacing matrix material sheet is placed on a preselected surface of the drill bit. The hardfacing matrix material sheet is then fusion bonded to the drill bit.

L'invention concerne un trépan de forage dans le sol et un procédé permettant d'augmenter la durabilité de ce trépan, qui comprend l'étape qui consiste à obtenir une feuille déformable d'un matériau de matrice de durcissement de surface. La feuille déformable de matériau de durcissement de surface présente une matrice de nickel et de chrome combinée avec un premier élément. Le premier élément est sélectionné dans l'ensemble constitué du carbure de tungstène sphérique fritté, du carbure de tungstène sphérique coulé et du métal vitrifié. La feuille de matériau de matrice de durcissement de surface est placée sur une surface présélectionnée du trépan. La feuille de matériau de matrice de durcissement de surface est ensuite liée au trépan par fusion.

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