Process for the preparation of a copper-zinc material
US4238249A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1978 |
| Grant date | Dec 9, 1980 |
| Priority date | — |
| Expiry date | Dec 18, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the preparation of a copper-zinc material consists of setting out with an alloy having a theoretical copper content of 61 to 65%, preferably 62% by weight, with the remainder being zinc and common impurities. This alloy is initially cast and, if necessary, subjected to an .alpha. stabilizing annealing. After subsequent cold working in one or a few operative steps with a degree of deformation of at least 70%, the alloy is subjected to a heat treatment so as to lead to a .beta..sub.1 precipitation and recrystallization. The alloy then evidences a structure in which the recrystallized phases .alpha. and .beta..sub.1 are present as a discrete fine mixture. Thereafter, the alloy can be again cold worked and annealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.