Surface-covered cubic boron nitride sintered body tool and...

B - Operations – Transporting – 23 – B

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Details

B23B 27/14 (2006.01) B23B 27/20 (2006.01) B23P 15/28 (2006.01) C23C 14/06 (2006.01)

Patent

CA 2559807

A surface-covered CBN sintered body tool (1) includes a base material (2) formed with a cubic boron nitride (CBN) sintered body and a surface covering film (3) covering a surface of the base material (2), and has a nega-land (4) exposing the CBN sintered body in at least a portion thereof and a flank (5) having the surface covering film (3) formed thereon. With this, the surface-covered CBN sintered body tool (1) having high defect resistance and wear resistance can be provided. The surface covering film (3) preferably includes a nitride or a carbonitride of a compound including at least one element selected from the group consisting of Ti, Cr, Zr, and V and at least one element selected from the group consisting of Al, Si and B, or a nitride or a carbonitride of Ti.

Il est prévu un outil (1) de compact fritté de nitrure de bore cubique revêtu superficiellement comprenant un matériau de base (2) constitué de compact fritté de nitrure de bore cubique (CBN) et, recouvrant une surface du matériau de base (2), un film de revêtement superficiel (3), dans lequel une plage de connexion négative (4) présentant le compact fritté CBN exposé au moins en une partie de celui-ci et un flanc (5) possédant le film de revêtement superficiel (3). Ainsi, on peut obtenir un outil (1) de compact fritté CBN revêtu superficiellement à la fois d'une excellente résistance à la fracture et d'une excellente résistance à l'abrasion. On préfère que le film de revêtement superficiel (3) contienne un nitrure ou un nitrure de carbone d'un composé constitué d'au moins un élément sélectionné parmi le groupe consistant en Ti, Cr, Zr et V et au moins un élément sélectionné parmi le groupe consistant en Al, Si et B, ou contienne un nitrure ou un nitrure de carbone de Ti.

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