Seco Tools Ab

Jan Qvick

Jenni Zackrisson

Bo Jansson

Sakari A Ruppi

Tommy Larsson

Hindrik Engstrom

Rolf Olofsson

Anette Sulin

Peter Lofroth

Hanna Kallerhult

Peter LÖFROTH

Hindrik Engström

A cutting tool insert having a cemented carbide substrate and a coating including a layer of NbN, wherein the cemented carbide substrate includes 11-12.5 wt % cobalt, 0.2-1.2 wt % chromium, and 86.3-88.4 wt % wolfram carbide.

Coated cutting insert

A cutting tool insert has a cemented carbide substrate and a coating. The cemented carbide substrate includes 73-93 wt % WC, 4-12 wt % binder phase, and cubic carbide phase with a binder phase enriched surface zone essentially free of cubic carbide phase. The cubic carbide phase includes elements from the groups IVB and VB, with the Ta content on a level corresponding to a technical impurity. Inserts according to the invention exhibit favorable edge strength and thermal shock resistance.

Cemented carbide with binder phase enriched surface zone

A cutting tool insert particularly useful for wet and dry milling of low and medium alloyed steels and stainless steels includes a cemented carbide body with a coating consisting of an MTCVD Ti(C,N) layer and a multi-layer coating being composed of &kgr;-Al O and TiN or Ti(C,N) layers.

Coated cutting insert for milling and turning applications

An improved method of making submicron cemented carbide bodies include wet milling powders of WC and Co and grain growth inhibitors to a slurry, drying the slurry to a powder, uniaxial pressing of the powder to form bodies of a desired shape, and sintering. WC powder is provided with an FSSS grain size, d , of less than 1 &mgr;m and a Co powder with an FSSS grain size, d , such that the ratio d /d is 0.75-1.5.

Method of making submicron cemented carbide cutting tool inserts

Cemented carbide with a hardenable binder phase

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Virsbo, Sweden

Jan Qvick