CEMENTED TUNGSTEN CARBIDE BODIES HAVING A COBALT-BORON ALLOY MATRIX

A cobalt-boron alloy is used as the matrix in a polycrystalline diamond compact. The matrix is hot isostatic pressed with tungsten carbide to form a substrate. The substrate is then high-pressure, high temperature sintered with a diamond powder, preformed and acid-leeched diamond plate, or another u...

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Hauptverfasser:	Jiang Yuming, Alkhalaileh Samer, Chen Zheng
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS GRINDING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS POLISHING TOOLS FOR GRINDING, BUFFING, OR SHARPENING TRANSPORTING
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Beschreibung
Zusammenfassung:	A cobalt-boron alloy is used as the matrix in a polycrystalline diamond compact. The matrix is hot isostatic pressed with tungsten carbide to form a substrate. The substrate is then high-pressure, high temperature sintered with a diamond powder, preformed and acid-leeched diamond plate, or another ultra-hard material in a press mold to sweep the matrix, thereby creating an ultra-hard polycrystalline compact at a temperature 400° C. lower and with less graphitization than conventional techniques using cobalt binder. The compact is stronger and has a longer useful life than conventional compacts.