Patent ID: 7621974
Filing Date: 2009-11-24
Classification: B22F,B23K,B32B,C04B,Y10T

Abstract:
1. A cutting tip, comprising: a cemented carbide cutting base; a diamond element supported by said cutting base; and a bonding layer formed between said cutting base and said diamond element in order to bond them; wherein said bonding layer includes a diffusion layer in which one or two or more metals selected from a group consisting of Fe, Ni, Co, Ti, Zr, W, V, Nb, Ta, Cr, Mo, and Hf diffuses into at least one of said cemented carbide or said diamond, and when a cross-section in a transverse direction of said bonding layer is line analyzed using EPMA, the maximum value of a content of said metals in said cross section is 20 times or greater than an average value of a content of said metals in a region of the cemented carbide element not influenced by the diffusion, and 100 times or greater than an average value of a content of said metal in a region of said diamond element not influenced by the diffusion.