Insert for milling of cast iron

US8084148B2 · kind B2 · utility

Assignee

• Seco Tools AB · SE

Inventors

• Andreas Larsson · Kalmar, SE
• Tommy Larsson · Ludvika, SE
• Jon Andersson · Karlskrona, SE

Key dates

• Filing date: Sep 10, 2008
• Grant date: Dec 27, 2011
• Expiry date: Aug 16, 2029

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, particularly useful for milling of cast iron, methods for making the inserts, and methods of their use are disclosed. The inserts are characterized by a composition of the substrate of about 5-7 wt % Co, about 0.05-2.0 wt % total amount of the metals selected from the group consisting of Ti, Nb,Ta and combination thereof, and balance WC with a coercivity (Hc) of 1 about 4-19 kA/m and an S-value of about 0.81-0.96. The coating comprises a homogeneous layer of (TixAl1-x)N, where x is between about 0.25 and about 0.50 with a crystal structure of NaCl type and a total thickness of between about 1.0 and about 5.0 μm as measured on the middle of the flank face.