Method of making a cBN material

US10252947B2 · kind B2 · utility

Assignee

• HYPERION MATERIALS & TECHNOLOGIES (SWEDEN) AB · SE

Inventors

• Gerold Weinl · Alvesta, SE
• Annika Kauppi · Nordstraße, SE
• Malin Mårtensson · Borås, SE
• Torbjorn Selinder · Stockholm, SE
• Rui Shao · Dublin, US

Key dates

• Filing date: May 31, 2013
• Grant date: Apr 9, 2019
• Expiry date: Jun 30, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/80
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A cBN material and a method of making a cBN material, the method including the steps of providing a powder mixture comprising cBN grains, aluminum and a Ti(CxNyOz)a powder, subjecting the powder mixture to a milling to form a powder blend, subjecting the powder blend to a forming operation to form a green body, subjecting the green body to a pre-sintering step, at a temperature between 650 to 950° C., to form a pre-sintered body, and subjecting the pre-sintered body to a HPHT operation to form the cBN material. For the Ti(CxNyOz)a powder, 0.05≤z≤0.4. In addition, a cBN material includes cBN grains, an Al2O3 phase, a binder phase of TiC, TiN and/or TiCN, W and Co, whereby a quotient Q is <0.25 of the cBN material.