Cutting tool

US12370605B2 · kind B2 · utility

Assignee

• AB Sandvik Coromant · SE

Inventors

• Andreas Blomqvist · Stockholm, SE
• Jose Luis GARCIA · Stockholm, SE
• Erik HOLMSTROM · Huddinge, SE

Key dates

• Filing date: Dec 17, 2020
• Grant date: Jul 29, 2025
• Expiry date: Feb 22, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12576
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A cutting tool includes a cemented carbide substrate. The cemented carbide consists of hard constituents in a metallic binder. The hard constituents include WC. The WC content in the cemented carbide is 80-93 wt %. The cemented carbide has Ni and Al, and a Ni content of 3-13 wt %, a weight ratio of Co/Ni<0.33, a weight ratio of Fe/Ni<0.25, a weight ratio of Cr/Ni<0.25 and a weight ratio of 0.02<Al/(Ni+Co+Fe)<0.1. The crack resistance W is defined as the ratio of the load applied on a Vickers hardness indentation and the total crack length of the cracks formed at the corners of the Vickers hardness indentation. The product of the hardness H(rake) at the rake face and the crack resistance W(rake) at the rake face is H(rake)*W(rake)>5000 HV100*N/μm.