Heat resistant sintered hard alloy
US5238481A · kind A · utility
12Cited by
13References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jan 23, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C32/0073
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A heat-resistant sintered hard alloy comprises 35% to 95% by weight of a WCoB type complex boride in a cobalt base alloy. The alloy contains 1.5% to 4.1% boron, 19.1% to 69.7% tungsten, optionally to 25% chromium, the balance being cobalt and a maximum of 1% impurities. Nickel, iron and/or copper may be substituted for portions of the cobalt content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.