Patent · US Active

Method of making a cemented carbide powder mixture and the resulting cemented carbide powder mixture

US7387658B2 · kind B2 · utility

5Cited by

5References

20Claims

0Family size

Assignee

Sandvik Intellectual Property AB · SE

Inventors

Alistair Grearson · Dudley, GB
Jonathan Fair · Coventry, GB
Rickard Sandberg · Vaxholm, SE

Key dates

Filing date	Jun 22, 2006
Grant date	Jun 17, 2008
Priority date	—
Expiry date	Jan 19, 2027

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F2998/10
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of making cemented carbide at which powders forming hard constituents and powders forming binder phase are wet milled together with a pressing agent is disclosed. The slurry is dried, preferably by spray drying, compacted into bodies of desired shape and sintered. A cemented carbide powder with a reduced compacting pressure at a predetermined weighing in of 18% shrinkage can be obtained by using from about 1 to about 3 wt-% pressing agent with the following composition: less than about 90 wt-% PEG and greater than about 10 wt-% of long chain C≧20 fatty acids, their esters and salts, in particular, erucic acid and/or behenic acid. The invention also relates to a cemented carbide powder with low compaction pressure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.