cBN composite material and tool

US8414229B2 · kind B2 · utility

Assignee

• ELEMENT SIX ABRASIVES S.A. · LU

Inventors

• Nedret Can · Boksburg, ZA
• Guven Akdogan · Johannesburg, ZA
• Peter Michael Harden · Sandton, ZA
• Cornelius Johannes Pretorius · Sixmilebridge, IE

Key dates

• Filing date: Apr 23, 2007
• Grant date: Apr 9, 2013
• Expiry date: Apr 23, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T407/26
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention provides a tool component comprising a first layer of polycrystalline cBN material which has a rake (working) surface and a flank surface and comprises less than 70 vol % cBN; and a secondary layer across the rake surface or at least partially across the rake surface and comprising a refractory material and optionally a binder phase and optionally cBN, wherein the secondary layer has a higher resistance to crater formation than the first layer of cBN material and has a lower affinity towards iron than cBN.