To provide a diamond coating end mill capable of cutting even a material difficult to cut such as a high silicon aluminium alloy without damaging a edge part.
A rake face of the edge part is not less than -10° and not more than -60° at a rake angle E and rake face length F is characteristically at least 0.2 mm on the end mill for high silicon aluminium alloy cutting furnished with the edge part forming a diamond coating layer 2 on a base material surface. Cemented carbide a crystal grain diameter of a WC layer of which is not more than 4 μm, breaking resistanct force strength of which is not less than 100 kg/mm2 and a thermal expansion coefficient of which is not more than 5.0×10-6°C is used for the base material, and it is favourable to have small cracks on the crystal grains of the WC layer. It is favourable that the diamond layer is fomed not more than 20 μm in thickness by a diamond of not more than 10 μm in average grain diameter.
| JP5834518 | Rotating cutting tool with replaceable cutting edge |
| WO/1999/025519 | MILLING CUTTER |
KAZAHAYA KATSUO
KAWANISHI MAKOTO
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