EP 0967037 B1 20100922 - Polycrystalline diamond compact cutter with interface
Title (en)
Polycrystalline diamond compact cutter with interface
Title (de)
Polykristallines Diamant-Schneidelement mit Zwischenflächen
Title (fr)
Elément de coupe en diamant polycristallin compacte avec interface
Publication
Application
Priority
- US 7236398 A 19980504
- US 26739199 A 19990315
Abstract (en)
[origin: EP0967037A2] A higher performance cutter for use in drilling, mining and quarrying comprises an abrasive layer; a cemented carbide core bonded to said abrasive layer; and a cemented carbide outer layer bonded to said core; wherein the metal binder content of said core is less than the metal binder content of said outer layer.. The carbide substrate of the PDC cutter has improved adhesion of the diamond layer to the interface because of maximizing the interface surface, a harder/stiffer center region to support the diamond table, and a softer/tougher outer region to reduce the tendency for cracking. The cutting action of this product can also be designed to deploy a kerfing cutting action on the rock as the cutter develops a wear flat. The transition from the diamond layer to the carbide can be accomplished in a more symmetrical pattern that could be achieved through other production methods. All interface surfaces can be produced with rounded and curved surfaces such that there are no flat surfaces or straight lines which would act as stress raisers.
IPC 8 full level
B22F 7/06 (2006.01); B23B 27/14 (2006.01); B23P 15/28 (2006.01); B24D 3/00 (2006.01); B24D 3/06 (2006.01); B24D 7/18 (2006.01); E21B 10/573 (2006.01)
CPC (source: EP KR)
B22F 7/06 (2013.01 - EP); B24D 3/00 (2013.01 - KR); B22F 2998/00 (2013.01 - EP)
Designated contracting state (EPC)
GB IE
DOCDB simple family (publication)
EP 0967037 A2 19991229; EP 0967037 A3 20070725; EP 0967037 B1 20100922; JP 2000033574 A 20000202; KR 19990088003 A 19991227
DOCDB simple family (application)
EP 99303237 A 19990427; JP 12336199 A 19990430; KR 19990015596 A 19990430