POLYCRYSTALLINE DIAMOND COMPACT HAVING MULTIPLEX SINTERED POLYCRYSTALLINE DIAMOND AND THE MANUFACTURING METHOD THEREOF

摘要

The present invention relates to a composite polycrystal-diamonds, with a polycrystalline diamond sintered body and manufacturing method, a kind of method for manufacturing the composite polycrystal-diamond including polycrystalline diamond sintered body according to the present invention includes: a first order of the first diamond dust of preparation; It is sintered a second step of blocking first diamond dust under a pressure condition of 5 to 6 GPa and 1300 to 1500 temperature manufactures the first polycrystalline diamond sintered body, there is the diameter smaller diameter than cemented carbide substrate; One third step places the first polycrystalline diamond sintered body in the middle section in cemented carbide substrate and assembles the second diamond dust around the first polycrystalline diamond sintered body; It is sintered in the case where 5 to 6 GPa and a temperature that pressure is 1300 to 1500, the body. of second polycrystalline diamond sintering is made with the second diamond dust of tableAccording shapes are to existing invention, and the outside of internal sintering and polycrystalline diamond sintered body is in progress respectively, so that the sintered body of polycrystalline diamond sintered body can be manufactured to have identical sintering characteristic.