Cemented carbide insert and method of making same

USRE39814E1 · kind E1 · reissue

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Mikael Lindholm · Kalmar, SE
• Anders Lenander · Tyresö, SE
• Per Lindskog · Alvesta, SE

Key dates

• Filing date: Jun 8, 2006
• Grant date: Sep 4, 2007
• Expiry date: Jun 8, 2026

Classification

• Technology area (CPC —): General

Abstract

The present invention relates to a coated cemented carbide cutting tool particularly for turning applications with high toughness demands, of stainless steels of different compositions and microstructures, and of low and medium alloyed non-stainless steels. The cemented carbide is WC-Co based with a composition of 9-12 wt % Co, 0.2-2.0 wt % cubic carbides from elements from group IVa, Va or VIa of the periodic table and balance WC with a grain size of 1.5-2 μm. The binder phase is W-alloyed with a CW-ratio in the range of 0.77-0.95. The coating includes a multilayered structure of the composition (TixAl1−x,)N in which x varies repeatedly between the two ranges 0.45<x<0.55 and 0.70<x<0.80, adding up to a total thickness of 2-9 μm.