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Title:
MAGNESIUM ALLOY FOR CASTING AND MAGNESIUM ALLOY CAST
Document Type and Number:
WIPO Patent Application WO/2008/133218
Kind Code:
A1
Abstract:
A casting magnesium alloy characterized by containing 1-5 mass% copper (Cu) and 0.1-5 mass% calcium (Ca) based on the whole alloy and containing tin (Sn) in such an amount that the ratio of the mass of Sn to that of the Ca, Sn/Ca, is 0.1-3, with the remainder being magnesium (Mg) and incidental impurities. Due to the incorporation of Cu, Ca, and Sn, crystals of not only an Mg-Cu compound but an Mg-Ca-Sn compound separate out so as to form a network structure (three-dimensional network structure) at the boundary between Mg crystal grains. The three-dimensional network structure inhibits boundary sliding, which is apt to occur especially at high temperatures, to improve high-temperature strength and high-temperature creep resistance. Since the Sn forms a compound preferentially with the Ca, it exerts less adverse influences on thermal conductivity than the other additive elements.

Inventors:
OKAMOTO YUKI (JP)
KINOSHITA KYOICHI (JP)
TANIZAWA MOTOHARU (JP)
YOSHIDA KAZUHIKO (JP)
Application Number:
PCT/JP2008/057646
Publication Date:
November 06, 2008
Filing Date:
April 14, 2008
Export Citation:
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Assignee:
TOYOTA JIDOSHOKKI KK (JP)
OKAMOTO YUKI (JP)
KINOSHITA KYOICHI (JP)
TANIZAWA MOTOHARU (JP)
YOSHIDA KAZUHIKO (JP)
International Classes:
C22C23/00; B22D21/04
Foreign References:
JPH0625791A1994-02-01
JP2005054233A2005-03-03
JP2003113436A2003-04-18
JPS5511191A1980-01-25
Other References:
RAO K.P. ET AL.: "High Temperature Deformation Behaviour of a New Magnesium Alloy", KEY ENGINEERING MATERIALS, vol. 340-341, no. PART 1, 12 April 2007 (2007-04-12), pages 89 - 94
Attorney, Agent or Firm:
OHKAWA, Hiroshi (Nakamura-kuNagoya-sh, Aichi 02, JP)
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