Cemented carbide with a hardenable binder phase
US6258147A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2000 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Jan 19, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a sintered cemented carbide consisting of 50 to 90 wt-% submicron WC in a hardenable binder phase. The binder phase comprises, in addition to Fe, 10-60 wt-% Co, <10 wt-% Ni, 0.2-0.8 wt-% C, Cr, W, Mo and/or V in amounts satisfying the relations EQU 2x.sub.C <x.sub.W +x.sub.Cr +x.sub.Mo +x.sub.V <2.5x.sub.C where x denotes mol fraction elements in the binder phase and the following relation for the total Cr content EQU 0.03<wt-% Cr/(100-wt-% WC)<0.05 In addition, the binder phase consists of martensite with a fine dispersion, a few percent, of coherent carbides, preferably of M.sub.2 C type, with a size of the order of 10 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.