Sandvik Ab

Torbj&ouml;rn Selinder

Anders Piirhonen

Gregor Kullander

Anders Jonsson

Klaus Goedicke

Siegfried Schiller

Fred Fietzke

Ingrid Reineck

Olaf Zywitzki

Mats Ahlgren

Mats Sj&ouml;strand

Christian Strondl

A method of making a cutting tool, the cutting tool having a WC&mdash;Co based cemented carbide body and a multi-layer coating, the method including: applying a first innermost bonding layer TiN to the body; applying a second layer in the form of a multilayered structure having sublayers of (Ti Al )N where x varies according to 0.45<x<0.55 and 0.70<x<0.80; applying a third layer of (Ti Al )N where x is 0.45<x<0.55; and applying a forth outermost layer on TiN.

Method of making grooving or parting insert

The present invention describes a coating cutting tool for metal machining and a process for producing such tools. The coating is composed of one or more layers of refractory compounds of which at least one layer consists of nanocrystalline aluminum spinel of the type (Me) Al O where Me is a second metal and 0<x&lE;1, deposited by Physical Vapor Deposition.

PVD coated cutting tool and method of its production

The present invention relates to a coated cutting tool (e.g.&mdash;cemented carbide insert) useful for grooving or parting of steel or stainless steel components such as tubes and bars. The insert is characterised by a WC-Co-based cemented carbide substrate having a highly W-alloyed Co-binder phase and a hard and wear resistant coating including a multilayered structure of sublayers of the composition (Ti Al )N with a periodic and repeated variation of the Ti/Al ratio.

Coated grooving or parting insert and method of making same

There is disclosed a cutting tool comprising a body of a sintered cemented carbide or cermet, ceramic or high speed steel on which at least on the functioning parts of the surface of the body, a thin, adherent, hard and wear resistant coating is applied. The coating comprises a laminar structure of refractory compounds in a polycrystalline, repetitive form, (MLX/Al,O,)/(MLX/Al,O,)/(MLX/Al,O,)/(MLX/Al,O,)/ . . . , where the alternating sublayers consist of metal nitrides (or carbides) and crystalline alumina of the alpha (&agr;)- and/or the gamma (&ggr;) phase, preferably of metal nitrides and crystalline alumina of the gamma phase, and in said coating the sequence of individual layer thicknesses has no repeat period but is essentially aperiodic throughout the entire multilayered structure. The metal elements in the layers MLX are selected from Ti, Nb, Hf, V, Ta, Mo, Zr, Cr, W, Al and mixtures thereof. The total thickness of said multilayered coating is between 0.5 and 20 &mgr;m.

Multilayered PVD coated cutting tool

The present invention relates to a coated cutting tool insert useful for grooving or severing steel components such as steel or stainless steel tubes and bars. The insert is characterized by WC&mdash;Co-based cemented carbide substrate having a highly W-alloyed Co-binder phase and a relatively thin coating including an inner layer of TiC,N,O,with columnar grains followed by a layer of fine grained &kgr;&mdash;Al,O,and a top layer of TiN.

Growing community of inventors

Stockholm, Sweden

Torbjörn Selinder

Growing community of inventors

Stockholm, Sweden

Torbj&ouml;rn Selinder

Torbjörn Selinder