Walter Ag

Ulrich Albers

Veit Schier

Dominic Diechle

A coated cutting tool includes a substrate of cemented carbide, cermet, cBN, ceramics or HSS and a coating of a nitride layer, which is a High Power Impulse Magnetron Sputtering (HIPIMS) deposited layer of a nitride of one or more of Ti, Zr, Hf, V, Ta, Nb, Cr, Si and Al, and a HIPIMS-deposited oxide layer being an (AlMe)Olayer, 0.05&#x2264;a&#x2264;1, wherein Me is one or more of Ti, Mg, Ag, Zr, Si, V, Fe, Hf, B and Cr. The oxide layer is situated above the nitride layer. Also, a method is disclosed for producing a coated cutting tool having the nitride layer and oxide layer, the nitride layer and the oxide layer being deposited by a HIPIMS process.

Coated cutting tool and a method for its production

A metal cutting tool includes a main body made of cemented carbide, cermet, ceramic, steel or high-speed steel, and a multi-layer wear protection coating. The wear protection coating includes a lower layer having an overall composition of TiAlN with 0.25&#x3c;m&#x3c;0.55 and an overall thickness of 500 nm to 3 &#x3bc;m. The lower layer has 50 to 600 pairs of alternately stacked sub-layers in a sequence (A-B-A-B- . . . ) and having a composition TiAlN with 0.45&#x2264;a&#x2264;0.55 and a thickness of 1 nm to 10 nm. The upper layer has 30 to 400 triples of alternately stacked sub-layers in a sequence (C-D-E-C-D-E- . . . ). The sub-layers of the upper layer have a composition TiAlSiN with x+y+z=1 and 0.20&#x2264;x&#x2264;0.45, 0.20&#x2264;y&#x2264;0.45 and 0.20&#x2264;z&#x2264;0.45 and a thickness of 1 nm to 10 nm.

Metal cutting tool with multi-layer coating

A tool includes a base body of hard metal, cermet, ceramics, steel or high speed steel and a multi-layer wear protection coating deposited thereon by a PVD process. The wear protection coating has a first coat deposited on the base body having a composition of TiaAl(1-a)N, wherein 0.4&#x2264;a&#x2264;0.6, and a coating thickness of 0.5 &#x3bc;m to 4 &#x3bc;m, and a second coat deposited on the first coat. The second coat includes a sequence of 10 to 80 first and second layers alternatingly arranged one on top of each other. Each of the first and second layers has a thickness of 5 to 100 nm. Each first layer includes nitrides of the elements Ti, Al, Cr and Si, and each second layer has a composition of TixAl(1-x)N, wherein 0.4&#x2264;x&#x2264;0.6. The first and second coats have up to 10 at-% of further metals, B, C and/or O as impurities in each layer.

Tool with multi-layer arc PVD coating

Tool comprising a base body made of hard metal, cermet, ceramics, steel or high-speed steel and a single-layer or multi-layer anti-wear protective coating applied thereon in the PVD process, at least one layer of said anti-wear protective coating being a titanium-aluminum-nitride layer, TiAlN where x+y=1, which layer can contain, according to the process, up to 5% by weight of further metals, characterized in that the TiAlN layer is a multi-coat substructure having a plurality of periodically alternating TiAlN coats (A) where x(A)+y(A)=1 and TiAlN coats (B) where x(B)+y(B)=1, the Al concentration y(B) in coats (B) amounting at most to 70 at. % (y(B) 0.70) and the Al concentration y(B) in coats (B) being from 10 to 25 at. % higher than the Al concentration y(A) in coats (A) (y(B)=(y(A)+0.10) to (y(A)+0.25)).

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Starzach-Borstingen, Germany

Ulrich Albers