Title:
CU-NI-SI COPPER ALLOY PLATE WITH EXCELLENT DEEP-DRAW CHARACTERISTICS AND PRODUCTION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2012/004868
Kind Code:
A1
Abstract:
Provided is a copper-nickel-silicon (Cu-Ni-Si) copper alloy that strikes a balance between deep-draw characteristics, thermal ablation resistance plating and spring deflection limit and, in particular, is used in electric and electronic members that have excellent deep-draw characteristics and a Cu-Ni-Si copper alloy production method. The disclosed Cu-Ni-Si copper alloy contains 1.0-3.0 mass% Ni and Si that is ¼ the density of the Ni and the remainder consists of copper and inevitable impurities. Crystal grains within the alloy structure have an aspect ratio (crystal grain minor axis/crystal grain major axis) with an average value of 0.4-0.6. The average value for the grain orientation spread (GOS) of whole crystal grains, measured by electron backscatter diffraction (EBSD) using a scanning electron microscope with an attached backscattered electron imaging system, is 1.2-1.5°. The ratio (Ｌσ/Ｌ) of the total specific grain boundary length (Ｌσ) of the specific grain boundaries to the total grain boundary length (L) of the crystal grains is 60-70 %. The spring deflection limit is 450-600 N/mm2. At 150 °C and after 1000 hours, the solder had excellent deep draw characteristics and good thermal ablation resistance.
Inventors:
SAKURAI, Takeshi (Ltd. Wakamatsu Plant 128-7, Ohgi-Machi, Aizuwakamatsu-sh, Fukushima 22, 〒9658522, JP)
櫻井 健 (〒22 福島県会津若松市扇町１２８－７ 三菱伸銅株式会社 若松製作所内 Fukushima, 〒9658522, JP)
ABE, Yoshio (Ltd. Wakamatsu Plant 128-7, Ohgi-Machi, Aizuwakamatsu-sh, Fukushima 22, 〒9658522, JP)
阿部 良雄 (〒22 福島県会津若松市扇町１２８－７ 三菱伸銅株式会社 若松製作所内 Fukushima, 〒9658522, JP)
櫻井 健 (〒22 福島県会津若松市扇町１２８－７ 三菱伸銅株式会社 若松製作所内 Fukushima, 〒9658522, JP)
ABE, Yoshio (Ltd. Wakamatsu Plant 128-7, Ohgi-Machi, Aizuwakamatsu-sh, Fukushima 22, 〒9658522, JP)
阿部 良雄 (〒22 福島県会津若松市扇町１２８－７ 三菱伸銅株式会社 若松製作所内 Fukushima, 〒9658522, JP)
Application Number:
JP2010/061532
Publication Date:
January 12, 2012
Filing Date:
July 07, 2010
Export Citation:
Assignee:
MITSUBISHI SHINDOH CO., LTD (4-7-35, Kitashinagawa Shinagawa-k, Tokyo 50, 〒1408550, JP)
三菱伸銅株式会社 (〒50 東京都品川区北品川４－７－３５ Tokyo, 〒1408550, JP)
SAKURAI, Takeshi (Ltd. Wakamatsu Plant 128-7, Ohgi-Machi, Aizuwakamatsu-sh, Fukushima 22, 〒9658522, JP)
櫻井 健 (〒22 福島県会津若松市扇町１２８－７ 三菱伸銅株式会社 若松製作所内 Fukushima, 〒9658522, JP)
ABE, Yoshio (Ltd. Wakamatsu Plant 128-7, Ohgi-Machi, Aizuwakamatsu-sh, Fukushima 22, 〒9658522, JP)
三菱伸銅株式会社 (〒50 東京都品川区北品川４－７－３５ Tokyo, 〒1408550, JP)
SAKURAI, Takeshi (Ltd. Wakamatsu Plant 128-7, Ohgi-Machi, Aizuwakamatsu-sh, Fukushima 22, 〒9658522, JP)
櫻井 健 (〒22 福島県会津若松市扇町１２８－７ 三菱伸銅株式会社 若松製作所内 Fukushima, 〒9658522, JP)
ABE, Yoshio (Ltd. Wakamatsu Plant 128-7, Ohgi-Machi, Aizuwakamatsu-sh, Fukushima 22, 〒9658522, JP)
International Classes:
C22C9/06; C22C9/04; C22F1/08; H01B1/02; H01B13/00; C22F1/00
Attorney, Agent or Firm:
AOYAMA, Masakazu (Seiyo Patent Office, 701 Akiba Bldg., 3-3, Akihabara, Taito-k, Tokyo 06, 〒1100006, JP)
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Claims: