Anchored oxide coatings on hard metal cutting tools

Details Anchored oxide coatings on hard metal cutting tools Anchored oxide coatings on hard metal cutting tools

C - Chemistry, Metallurgy

23

C

C23C 16/26 (2006.01) B23B 27/14 (2006.01) C23C 16/34 (2006.01) C23C 16/36 (2006.01) C23C 16/40 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2235807

A cutting tool insert comprises a hard metal substrate having at least two wear-resistant coatings including an exterior ceramic coating and a coating under the ceramic coating being a metal carbonitride having a nitrogen to carbon atomic ratio between 0.7 and 0.95 which causes the metal carbonitride to form projections into the ceramic coating improving adherence and fatigue strength of the ceramic coating.

Une pièce rapportée pour outils coupants comprend un substrat en métal dur présentant au moins deux revêtements résistants à l'usure comprenant un revêtement extérieur en céramique et un revêtement sous ce dernier, constitué d'un carbonitrure de métal dont le rapport atomique entre l'azote et le carbone est compris entre 0,7 et 0,95, ce qui provoque la formation de parties saillantes en carbonitrure de métal dans le revêtement en céramique, améliorant la solidité de fixation et la résistance à la fatigue du revêtement en céramique.

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