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1. (WO2015122671) POLYCRYSTALLINE DIAMOND COMPACT

Pub. No.:    WO/2015/122671    International Application No.:    PCT/KR2015/001327
Publication Date: Fri Aug 21 01:59:59 CEST 2015 International Filing Date: Wed Feb 11 00:59:59 CET 2015
IPC: C04B 35/52
C04B 35/64
B23B 27/20
Applicants: ILJIN DIAMOND CO.,LTD.
일진다이아몬드 주식회사
Inventors: JUN, Hui Soo
전휘수
PARK, Hee Sub
박희섭
Title: POLYCRYSTALLINE DIAMOND COMPACT
Abstract:
The present invention relates to a polycrystalline diamond compact, and a method for manufacturing a polycrystalline diamond compact, according to the present invention, comprises: a first assembling step of assembling a first diamond powder on a carbide substrate; a first sintering step of preliminarily sintering the assembled carbide substrate and the first diamond powder on the carbide substrate to form a first polycrystalline diamond layer on the carbide substrate; a second assembling step of assembling a second diamond powder having a particle diameter in the range of 0.1μm to 5μm on the first polycrystalline diamond layer; and a second sintering step of sintering the assembled carbide substrate, the first polycrystalline diamond layer, and the second diamond powder on the first polycrystalline diamond layer to form a second polycrystalline diamond layer on the first polycrystalline diamond layer. According to the present invention, the content of a metal binder (catalyst) in a portion which is used in bedrock cutting during actual drilling, that is, a superficial portion of the polycrystalline diamond layer, is controlled to be minimized, thereby increasing heat resistance and improving wear resistance and impact resistance.