Patent ID: 9470043
Filing Date: 2016-10-18
CPC Classification: B22F,C22C,E21B

Claim Text:
1. A cutting element comprising: a metallic carbide body; an outer layer of polycrystalline diamond material on the outermost end of the insert, the polycrystalline diamond material comprising a plurality of interconnected first diamond grains; a first binder material in interstitial regions between the interconnected first diamond grains, and a first metal carbide material; and at least one transition layer between the metallic carbide body and the outer layer, the at least one transition layer comprising a composite of second diamond grains, second metal carbide particles having an average grain size larger than the average grain size of the first metal carbide particles, and a second binder material, wherein the second metal carbide particles form a matrix in which the second diamond grains are dispersed, wherein the second metal carbide particles are present in the at least one transition layer in an amount ranging from about 15 to 30 volume percent.