Patent · US Active

Method for making functionally graded cemented tungsten carbide with engineered hard surface

US8163232B2 · kind B2 · utility

30Cited by

23References

10Claims

0Family size

Assignee

University of Utah Research Foundation · US

Inventors

Zhigang Fang · Diemelstraße, US
Peng Fan · Huizhou, CN
Jun Guo · Tainan, TW

Key dates

Filing date	Oct 28, 2008
Grant date	Apr 24, 2012
Priority date	—
Expiry date	Jan 17, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F2999/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for manufacturing functionally graded cemented tungsten carbide with hard and wear-resistant surface and tough core is described. The said functionally graded cemented tungsten carbide (WC—Co) has a surface layer having a reduced amount of cobalt. Such a hard surface and tough core structure is an example of functionally graded materials in which mechanical properties are optimized by the unique combination of wear-resistance and toughness. WC—Co with reduced-cobalt surface layer may be fabricated through a carburization heat treatment process following conventional liquid phase sintering. The graded WC—Co thus obtained contains no brittle η phase.

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