Lead-free free-cutting copper-antimony alloys
US7628872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2004 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Jul 8, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C9/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A lead-free free-cutting copper-antimony alloy comprises in percentage by weight: 55 to 65% Cu, 0.3 to 2.0% Sb, 0.2 to 1.0% Mn, at least two elements selected from the group of Ti, Ni, B, Fe, Se, Mg, Si, Sn, P and rare-earth metal in amount of 0.1-1.0%, as well as balance Zn and unavoidable impurities. The brass alloys according to the present invention possess superior cutting property, weldability, corrosion resistance, dezincification resistance and high-temperature-oxidation resistance, and are suitable for use in drinking-water installations, domestic appliances, toy for children, fastener, etc. The process for producing such alloys is also proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.