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

US7989092B2 · kind B2 · utility

Assignee

• Seco Tools AB · SE

Inventors

• Erik Sundstrom · Sandviken, SE
• Jacob Sjolen · Fagersta, SE
• Niklas Ahlen · Söderbärke, SE

Key dates

• Filing date: Jul 7, 2008
• Grant date: Aug 2, 2011
• Expiry date: Jul 25, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/265
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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 (Ti1-xSix)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 μm and about 2.0 μm with a strong (200)-texture.