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US 2013/0171374 A1Published application
Pvd coating for metal machining
AssigneeOerlikon Surface Solutions AG, Pfaeffikon
InventorsJacob Sjölén, Jon Andersson, Jörg Vetter, Jürgen Müller
Life of this patent
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Abstract
The present invention relates to a wear resistant coating suitable to be deposited on cutting tool inserts for chip forming metal machining. The coating comprises at least two layers with different grain size, but with essentially the same composition. The coating is deposited by Physical Vapour Deposition (PVD).
Claims9
1-9. (canceled)
Deposition method using the vacuum arc evaporation to deposit AlTiN coatings with a composition minimal:
- (AlxTi1-X)N 55≦X≦74 at %
- or with a composition:
- (AlxMe1-X)N, Me:
- Ti or alloys with Cr, Zr, Hf, V 4-5 group elements,
- or with a composition:
- (AlaMe1-z-bZb)N, Z:
- B, S, Y, Ce, Sc 0≦b<<10 at %,
- wherein at least one layer is provided showing a fine morphology and consisting of majority phase of a fcc-lattice type combined with a certain content of the w-AlN-lattice type, by selection of the evaporator current in combination with the magnetic field of the evaporator in such a way that a weak magnetic field of about 0.5 to 2.5 mT is used with the field mainly perpendicular to the cathode surface, and a current of at least 100 A, and more at a nitrogen pressure of 0.5 to 10 Pa, and a bias voltages of about 20 to 300 V, at a deposition temperature between 300 to 700° C., is applied and at the same time using a strong magnetic field of about 3 to 20 mT with the field mainly perpendicular to the cathode surface, and current of at least 50 A and more, at a nitrogen pressure of 0.5 to 10 Pa, and bias voltages of about 20 to 300 V, at a deposition temperature in between 300 to 700° C., is applied.
5 more elements
11-12. (canceled)
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16-18. (canceled)
Dependencies are inferred from the claim text.