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Title:
COPPER ALLOY AND ITS PRODUCTION METHOD
Document Type and Number:
Japanese Patent JP2005298931
Kind Code:
A
Abstract:

To provide a copper alloy in which strength as that of a base metal is increased, and further, elongation can be improved as well, and which is, in its turn, provided with satisfactory bending workability and has excellent thermal creep resistance as well, and to provide its production method.

The copper alloy at least comprises zirconium in the range of, by weight%, 0.005 to 0.5, is provided with a first grain group consisting of crystal grains with crystal grain sizes of ≤1.5 μm, a second grain group composed of crystal grains whose shape elongates to one direction, and having crystal grain sizes of >1.5 to <7 μm, a third grain group composed of crystal grains having crystal grain sizes of ≥7 μm, and provided that the total area ratio of the first grain group occupying in the unit area totalized regarding the crystal grain sizes is defined as α, the total area ratio of the second grain group as β, the total area ratio of the third grain group as γ, and α+β+γ=1, the total of the α and the β is higher than the γ, and also, the α is smaller than the β.


Inventors:
ISHIDA MASAHIKO
KUMAGAI JUNICHI
SUZUKI TAKESHI
Application Number:
JP2004000118968
Publication Date:
October 27, 2005
Filing Date:
April 14, 2004
Export Citation:
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Assignee:
MITSUBISHI SHINDO KK
International Classes:
C22F1/08; B21B1/22; C21D1/26; C22C1/00; C22C9/00; C22C9/06; C22C9/10; C22F1/00; (IPC1-7): C22C9/00; C22C9/06; C22F1/08
Attorney, Agent or Firm:
志賀 正武
高橋 詔男
渡邊 隆
青山 正和
鈴木 三義
西 和哉
村山 靖彦