| 摘要 |
PURPOSE:To improve mass productivity and cutting property by joining a cutting edge member in which a boron nitride film is formed on the edge part, to a tip base material to construct the captioned cutting tip. CONSTITUTION:A BN film 6 is formed on the surface of a base body 6 whose main components are SiC and Si3N4 and which has a good adhesive property with a BN film, by means of a gas phase growing method, to form a cutting edge member 2. This cutting edge member 2 is joined to the base seat 7 of a tip base material 3 made of Si3N4, cemented carbide, etc. By this construction, the area of the BN film 6 can be restricted small, while the film can be easily made uniform, to improve cutting property and mass productivity. |
