B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
B23B 27/14 (2006.01) B01J 3/06 (2006.01) B23B 27/20 (2006.01) C01B 31/06 (2006.01) C04B 35/52 (2006.01)
Patent
CA 2675959
Disclosed is a cutting tool having excellent strength and wear resistance. The cutting tool has, in its cutting blade, a highly hard polycrystalline diamond which is produced by converting a raw material composition comprising a non-diamond carbon material directly into a diamond under ultra-high pressure/high temperature conditions without adding any sintering aid or catalyst, and which comprises substantially only a diamond. The polycrystalline diamond has a mixed structure composed of a fine diamond crystal having the largest crystal diameter of 100 nm or less and an average crystal diameter of 50 nm or less and a sheet-like or particulate coarse diamond crystal having the smallest crystal diameter of 50 nm or greater and the largest crystal diameter of 10000 nm or less.
La présente invention concerne un outil de coupe possédant une excellente résistance et résistance à l'usure. L'outil de coupe possède, dans sa lame de coupe, un diamant polycristallin très dur qui est produit en convertissant une composition de matières premières comprenant une substance carbonée n'étant pas du diamant en un diamant dans des conditions de très haute pression/haute température sans ajouter d'additif de frittage ou de catalyseur, et qui comprend essentiellement uniquement un diamant. Le diamant polycristallin possède une structure mixte composée d'un cristal de diamant fin possédant un diamètre de cristal maximum de 100 nm ou moins et un diamètre de cristal moyen de 50 nm ou moins et un cristal de diamant en forme de feuille ou grossier particulaire possédant un diamètre de cristal minimum de 50 nm ou plus et un diamètre de cristal maximum de 10000 nm ou moins.
Obata Kazushi
Sumiya Hitoshi
Yoshinaga Miki
A.l.m.t. Corp.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Sumitomo Electric Hardmetal Corp.
Sumitomo Electric Industries Ltd.
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