| 摘要 |
PURPOSE:To manufacture sintered body tool excellent in strength and abrasion resisting property, by mixing fine powder of carbide, nitride or boride of 4a, 5a and 6a group with raw material diamond powder and pressing under high pressure and temperature after molding. CONSTITUTION:Iron group metal powder is mixed with 95-30vol% of diamond powder of not more than 1mu and the remainder vol% of not less than one kind of carbide, nitride or boride of 4a, 5a, 6a group metals and these solid solution powder of not more than 1mu. The above mixture is put in the ultra high pressure apparatus and hot press is carried out under the condition of high pressure and temperature at the state of being the diamond stable after carrying out press molding. By the above method, grain growth of diamond is repressed and high strength sintered body excellent in abrasion resisting property, is obtained. The above sintered body is applied for drawing die required beautiful finishing face or bite for cutting of Al alloy or Cu alloy. |
