| (19) |
 |
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(11) |
EP 1 847 626 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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31.10.2007 Bulletin 2007/44 |
| (43) |
Date of publication A2: |
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24.10.2007 Bulletin 2007/43 |
| (22) |
Date of filing: 17.04.2007 |
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| (51) |
International Patent Classification (IPC):
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| (84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO
SE SI SK TR |
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Designated Extension States: |
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AL BA HR MK YU |
| (30) |
Priority: |
17.04.2006 JP 2006112941
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| (71) |
Applicants: |
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- Motegi, Tetsuichi
Funabashi-shi,
Chiba (JP)
- Adco Koki Co., Ltd.
Tokyo 160-0004 (JP)
- Sanyu Seiki Co. Ltd.
Tano-gun,
Gunma 370-2111 (JP)
- Saito, Kazuyoshi
Fukushima Minamisoma-shi (JP)
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| (72) |
Inventors: |
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- Motegi, Tetsuichi
Funabashi-shi Chiba (JP)
- Tamura, Yosuke
Chiba-shi Chiba (JP)
- Sanpei, Yukio
Clio Nishifunabashi No. 304,
Funabashi-shi Chiba (JP)
|
| (74) |
Representative: Schaumburg, Thoenes, Thurn, Landskron |
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Patentanwälte
Postfach 86 07 48
81634 München
81634 München (DE) |
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(57) A casting heat-resistance Mg alloy improved in heat resistance without relying upon
expensive RE contains Cu. More specifically, it contains Al (8.0 weight %), Cu (1.0-5.0
weight %), Zn (2.0 weight %), Be (0.01 weight %) and Mg (the rest). The alloy can
be prevented from deteriorating in corrosion resistance by adjusting the added amount
of Cu to 1.0-1.5 weight %. The corrosion resistance of the alloy can be improved more
by adding 0.5 to 1.0 weight % Mn as well.