Body coated with hard material

Details Body coated with hard material Body coated with hard material

C - Chemistry, Metallurgy

23

C

C23C 16/30 (2006.01)

Patent

CA 2717188

The invention relates to a body which is coated with hard material and has a plurality of layers applied by means of CVD, wherein the outer layer comprises Ti1-x Al x N, Ti1x-Al x C and/or Ti1-x Al x CN where 0.65 <= x <= 0.9, preferably 0.7 <= x <= 0.9, and this outer layer has compressive stresses in the range from 100 to 1100 MPa, preferably from 400 to 800 MPa, and a TiCN or Al2O3 layer is arranged under this outer layer.

L'invention concerne un objet revêtu d'un matériau dur, avec plusieurs couches appliquées par CVD, où la couche extérieure est constituée de Ti1-xAlxN, de Ti1-xAlxC et/ou de Ti1-xAlxCN, avec 0,65 = x = 0,9, de préférence 0,7 = x = 0,9, cette couche extérieure présentant des contraintes de compression comprises entre 100 et 1 100 MPa, de préférence entre 400 et 800 MPa, une couche de TiCN ou d'Al2O3 étant disposée sous de ces couches extérieures.

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