Title:
COPPER ALLOY SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2018/079507
Kind Code:
A1
Abstract:
Provided are an inexpensive copper alloy sheet having excellent stress corrosion cracking resistance as well as having excellent bending workability while maintaining high strength, and a method for manufacturing the same. In the present invention, a copper alloy sheet is manufactured by melting and casting a copper alloy raw material having a composition including 17-32% by mass of Zn, 0.1-4.5% by mass of Sn, 0.01-2.0% by mass of Si, and 0.01-5.0% by mass of Ni, the remainder being Cu and unavoidable impurities, performing hot rolling in a temperature range of 900°C-400°C and then cooling to a temperature of 400°C-300°C at a cooling rate of 1-15°C/minute, then performing cold rolling and subsequently performing recrystallization annealing at 300-800°C, and then performing age annealing at 300-600°C.
Inventors:
HIGAMI NAOTA (JP)
SUGIMOTO TAKANOBU (JP)
AOYAMA TOMOTSUGU (JP)
NARIEDA HIROTO (JP)
SUGIMOTO TAKANOBU (JP)
AOYAMA TOMOTSUGU (JP)
NARIEDA HIROTO (JP)
Application Number:
PCT/JP2017/038243
Publication Date:
May 03, 2018
Filing Date:
October 24, 2017
Export Citation:
Assignee:
DOWA METALTECH CO LTD (JP)
International Classes:
C22F1/08; C22C9/04; H01B1/02; H01B5/02; H01B13/00; C22F1/00
Domestic Patent References:
| WO2015046421A1 | 2015-04-02 | |||
| WO2017018487A1 | 2017-02-02 |
Attorney, Agent or Firm:
OKAWA Koichi (JP)
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