Surface-coated high hardness material for tool

Details Surface-coated high hardness material for tool Surface-coated high hardness material for tool

B - Operations, Transporting

23

B

B23B 27/14 (2006.01) B23B 27/04 (2006.01) B23B 27/20 (2006.01) C04B 41/87 (2006.01) C23C 14/06 (2006.01)

Patent

CA 2531028

It is an object of the invention to provide a tool for precision finishing and grooving of quenched steel by thinning a coating film of a CBN sintered compact tool. The invention provides a surface-coated high hardness material for tool comprising a cubic boron nitride sintered compact (CBN sintered compact, hereinafter) as a substrate and at least one coating film layer formed on the surface of the substrate wherein said coating film layer has thickness of 0.1 µm or more and less than 1 µm and comprises, as main component, a compound having at least one kind of element selected from C, N and O, and Ti and Al. If this material is used as a grooving tool, excellent performance is exhibited. Examples of the coating film are an intermediate layer, a wear-resistant film, a surface layer and the like.

[PROBLEMES] L'obtention d'un outil approprié pour le fini de précision ou le rainurage d'un acier trempé et comprenant un CBN fritté compact et un film de revêtement d'épaisseur réduite formé sur celui-ci. [MOYENS PERMETTANT DE RESOUDRE LES PROBLEMES] L'invention concerne un matériau à dureté élevée et à surface revêtue destiné à un outil et comprenant un CBN fritté compact comme matériau de base et, formée sur la surface de celui-ci, au moins une couche du film de revêtement comprenant, comme composant principal, un composé possédant Ti, Al et au moins un élément sélectionné parmi C, N et O et présentant une épaisseur pas inférieure à 0,1 mu m et inférieure à 1 mu m. L'invention concerne également un outil de rainurage comprenant le matériau susmentionné et dont les performances sont excellentes. Les films de revêtement susmentionnés comprennent une couche intermédiaire, un film résistant à l'abrasion et une couche de surface.

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