Coated cutting tool for general turning in heat resistant super alloys (HRSA)

US8110075B2 · kind B2 · utility

Assignee

• Seco Tools AB · SE

Inventors

• Erik Sundstrom · Sandviken, SE
• Rachid M'Saoubi · Fagersta, SE
• Jon Andersson · Karlskrona, SE

Key dates

• Filing date: Aug 25, 2011
• Grant date: Feb 7, 2012
• Expiry date: Aug 25, 2031

Classification

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

Abstract

Coated cemented carbide inserts are particularly useful in general turning of superalloys. The inserts are formed from a cemented carbide of WC about 5.0-7.0 wt-% Co, and about 0.22-0.43 wt-% Cr, where the substrate has a coercivity (Hc) of about 19-28 kA/m. The coating contains a single layer of (TixAl1-x)N-layer, where x is 0.25-0.50, with a crystal structure of NaCl type, a total thickness of about 3.0-5.0 μm, (200)-texture, and a compressive residual strain of about 2.5×10−3-5.0×10−3, optionally containing an outermost TiN-layer.