Sandvik Intellectual Property Ab

Andreas Hedin

Susanne Norgren

Jose Luis Garcia

Mats Ahlgren

Ann-Britt Ljungberg

Marie Pettersson

Nina Sjodahl

Roberth Ljunggren

Axel Genvad

Lars Gustafsson

Nina Sjödahl

The present invention relates to a method of making a cemented carbide comprising mixing in a slurry a first powder fraction and a second powder fraction, subjecting the slurry to milling, drying, pressing and sintering. The first powder fraction is made from cemented carbide scrap recycled using the Zn recovery process, comprising the elements W, C, Co, and at least one or more of Ta, Ti, Nb, Cr, Zr, Hf and Mo, and the second powder fraction comprising virgin raw materials of WC and possibly carbides and/or carbonitrides of one or more of Cr, Zr, W, Ta, Ti, Hf and Nb. The first powder fraction is subjected to a pre-milling step, prior to the step of forming the slurry, to obtain an average grain size of between 0.2 to 1.5 &#x3bc;m.

Method of making a cemented carbide

The present invention relates to a coated cutting tool comprising a PVD coating and a cemented carbide substrate comprising Co in an amount of 12.5-17 wt %, Cr in an amount such that the Cr/Co weight ratio is 0.05-0.15, a Ti of between 50 to 300 ppm by weight and a CW_Cr value between 0.8-0.97.

Coated cutting tool

The present invention relates to a cutting tool for metal machining with improved wear properties, comprising a cutting tool substrate of cemented carbide, cermet, ceramics or a super hard material, and a wear resistant coating, wherein the wear resistant coating comprises a PVD Ti&#x2014;Si&#x2014;C&#x2014;N layer, and a method of making thereof.

Coated cutting tool and a method of making thereof

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Stockholm, Sweden

Andreas Hedin