Surface-coated hard material for cutting tools or wear...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 14/06 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2042385

This invention relates to a surface-coated hard material for cutting tools or wear resistance tools, in which a coating layer is provided on the surface of a base material of a cutting tool or wear resistance tool to improve the wear resistance, characterized by providing a hard coating layer having a thickness of 0.5 to 10 µm and consisting of at least one member selected from the group consisting of carbides, nitrides and carbonitrides of M1-x Alx (M represents Ti, Zr or Hf and 0 ~ x ~ 0.5) such that the composition ratio of M and Al is changed in stages or continuously from M of the boundary with the substrate to MAl of the outer surface at the opposite side to the substrate on the surface of a cutting tool or wear resistance tool.

La présente invention a trait à un matériau dur de revêtement superficiel pour des outils de coupe ou des outils de résistance à l'usure. Une couche de revêtement est posée à la surface du matériau de base d'un outil de coupe ou d'un outil de résistance à l'usure pour améliorer la résistance à l'usure. L'invention se caractérise par la pose d'une couche de revêtement dur d'une épaisseur de 0,5 à 10 µm composée d'au moins un élément choisi dans le groupe comprenant les carbures, nitrures et carbonitrures de M1-x Alx (M représentant Ti, Zr ou Hf et 0 ~ x ~ 0,5) de façon que le rapport de composition de M et Al soit changé par étapes ou de façon continue de M à la limite du substrat à MAl de la surface extérieure, du côté opposé au substrat, sur la surface d'un outil de coupe ou d'un outil de résistance à l'usure.

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