Multilayer hard coating for tools

Details Multilayer hard coating for tools Multilayer hard coating for tools

2008-02-07

2009-11-17

Turner, Archene (Department: 1794)

Stock material or miscellaneous articles

Composite

Of inorganic material

C051S307000, C051S309000, C428S697000, C428S698000, C428S216000, C428S336000

Reexamination Certificate

active

07618720

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 (0.99≧z≧0.7). 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.

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