Multilayer hard coating for tools
AssigneeOc Oerlikon Balzers AG
InventorVolker Derflinger
Life of this patent
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Abstract
A multilayer hard coating for tools for machining applications with a multilayer structure for improving the wear resistance of workpieces includes at least one (AlyCr1-y) X layer (0.2≦y≦0.7), wherein X is one of the following elements N, C, B, CN, BN, CBN, NO, CO, BO, CNO, BNO, CBNO, but preferably N or CN, and/or a (TizSi1-z) layer (0.1≦z≦0.3). The hard coating also includes at least one layer stack with one (AlCrTiSi) X mixed layer, followed by another (TizSi1-z) X layer, followed by another (AlCrTiSi) X mixed layer, followed by another (AlyCr1-y) X layer.
Claims13
A hard layer with a multilayer structure for improving the wear resistance of workpieces that comprising:
- at least one (AlyCr1-y) X layer, wherein 0.2≦y≦0.7 and X is one of the following elements N, C, B, CN, BN, CBN, NO, CO, BO, CNO, BNO, CBNO, but preferably N or CN, and/or a (TizSi1-z) layer, wherein 0.01≦z≦0.3, characterized by the fact that the hard layer also includes
- at least one layer stack with the following composition:
- one (AlCrTiSi) X mixed layer
- followed by another (TizSi1-z) X layer
- followed by another (AlCrTiSi) X mixed layer
- followed by another (AlyCr1-y) X layer.
Dependencies are inferred from the claim text.