Cutting tool of polycrystalline hard sintered material

Details Cutting tool of polycrystalline hard sintered material Cutting tool of polycrystalline hard sintered material

B - Operations, Transporting

24

D

B24D 3/14 (2006.01) B23B 27/14 (2006.01)

Patent

CA 2326814

In a cutting tool of a polycrystalline hard sintered material of the invention, a cutting edge comprises the polycrystalline hard sintered material containing 20 vol% or more CBN, radius of curvature in cross section of a ridge of the cutting edge is between 5 µm or more and 30 µm or less, a flank and a rake face or negative land of the cutting tool are smoothly continued at said radius of curvature in cross section, and surface roughness of the ridge of the cutting edge is from 0.1 µm or more to 1.0 µm or less following an average roughness (Rz) of a ten point system.

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