Multilayer nitride hard coatings
AssigneeKennametal Inc.
InventorsVineet Kumar, Ronald Penich, Chen Chen, Zhenyu Liu, Nicholas F. Waggle, Jr.
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Abstract
In one aspect, coatings are described herein employing composite architectures providing high aluminum content and high hardness for various cutting applications. For example, a coated cutting tool comprises a substrate and a coating comprising a refractory layer deposited by physical vapor deposition adhered to the substrate, the refractory layer comprising a plurality of sublayer groups, a sublayer group comprising a titanium aluminum nitride sublayer and an adjacent composite sublayer comprising alternating nanolayers of titanium silicon nitride and titanium aluminum nitride.
Claims12
A coated cutting tool comprising:
- a substrate;
- and
- a refractory layer deposited by physical vapor deposition adhered to the substrate, the refractory layer comprising a plurality of sublayer groups, a sublayer group comprising a titanium aluminum nitride sublayer and an adjacent composite sublayer comprising alternating nanolayers titanium silicon nitride and titanium aluminum nitride, wherein the refractory layer has a critical load (Lc) of at least 100 kg.
Dependencies are inferred from the claim text.