Synthetic single crystal diamond for wire drawing dies

Details Synthetic single crystal diamond for wire drawing dies Synthetic single crystal diamond for wire drawing dies

1995-06-07

1996-10-01

Crane, Daniel C.

Metal deforming

Tool and/or tool holder

Tool comprising closed periphery deforming passageway

423446, B21C 302

Patent

active

055602410

ABSTRACT:
A synthetic single crystal diamond for wire drawing die; the process of manufacturing it and a wire drawing die to utilize it are disclosed. At least one plane of the diamond for wire drawing die is a cleavage plane of (111) faces, and the drawing hole of wire drawing die lies vertical to the cleavage plane. The diamond for the wire drawing die is produced by providing a synthetic single crystal having 20-400 ppm nitrogen of Ib type diamond. A groove is made on the diamond surface parallel to (111) faces employing energy beams such as a laser beam, an ion beam and an electron beam. A wedge is struck into the groove to cleave the diamond, and a plate is obtained. Furthermore, the plate is divided into polyhedrons, employing either an energy beam or a blade. The cleavage plane of the polyhedron is almost parallel to the (111) faces of crystal, therefore the cleavage plane is used as the standard plane to build the drawing hole.

REFERENCES:
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Sumitomo Electric Carbide, Inc. --Diamond Group, "Price List for CD Sumicrystal Wire Drawing Die Blanks", dated Oct. 17, 1988.

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