Seco Tools Ab

Niklas Ahlen

Erik Sundstrom

Rolf Olofsson

Forming coated cemented carbide inserts, particularly useful in fine turning of super alloys. The inserts are characterized by a composition of a cemented carbide of WC, about 4.0 wt-% Co to about 7.0 wt-% Co, about 0.25 wt-% Cr to 0.50 wt-% Cr, and a coercivity (Hc) of about 28 kA/m to about 38 kA/m. The coating comprises a single (TiSi)N-layer, where x is between about 0.1 and about 0.25, with a crystal structure of NaCl type and a total thickness between about 0.5 &#x3bc;m and about 2.0 &#x3bc;m with a strong (200)-texture.

Method of making a coated cemented carbide insert

Coated cemented carbide inserts, particularly useful in fine turning of super alloys, are disclosed. The inserts are characterized by a composition of a cemented carbide of WC, about 4.0 wt-% Co to about 7.0 wt-% Co, about 0.25 wt-% Cr to 0.50 wt-% Cr, and a coercivity (Hc) of about 28 kA/m to about 38 kA/m. The coating comprises a single (TiSi)N-layer, where x is between about 0.1 and about 0.25, with a crystal structure of NaCl type and a total thickness between about 0.5 &#x3bc;m and about 2.0 &#x3bc;m with a strong (200)-texture.

Fine grained cemented carbide for turning in heat resistant super alloys (HRSA)

The invention relates to a method of making cemented carbides having surfaces free free of detrimental binder phase layer. This is achieved by the inclusion of controlled amounts of carbonitride in the carbide composition. The invention also relates to the cemented carbides so formed.

Growing community of inventors

Soderbarke, Sweden

Niklas Ahlen