Copper alloy with punchability, and a manufacturing method thereof
US6482276B2 · kind B2 · utility
2Cited by
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14Claims
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Key dates
| Filing date | Apr 10, 2001 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A copper alloy with excellent punchability, comprising 0.2 to 0.35 wt % of Cr, 0.1 to 0.5 wt % of Sn, and 0.1 to 0.5 wt % of Zn, the balance being made of Cu and unavoidable impurities, wherein, in a Cu matrix, a precipitation phase A of Cr or a Cr compound of 0.1 to 10 &mgr;m in maximum diameter, is provided, at a density in number of 1×103 to 3×105/mm2, and a precipitation phase B of Cr or a Cr compound of 0.001 to 0.030 &mgr;m in maximum diameter, is provided, at a density in number that is 10 times or more of that of the precipitation phase A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.