Magnesium-based alloy for high temperature and a manufacturing method thereof

(19)

(11)

EP 2 374 905 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.12.2011 Bulletin 2011/51

(43)	Date of publication A2:
	12.10.2011 Bulletin 2011/41

(21)	Application number: 11159526.0

(22)	Date of filing: 24.03.2011

(51)

International Patent Classification (IPC):

C22C 1/06^(2006.01)
B22D 21/00^(2006.01)

C22C 23/02^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

29.03.2010 KR 20100028157
27.12.2010 KR 20100135979

(71)	Applicant: Korean Institute of Industrial Technology
	Cheonan-si Chungcheongnam-do 331-825 (KR)

(72)	Inventors:
	Kim, Shae K 331-825, Chungcheongnam-Do (KR) Seo, Jung Ho 331-825, Chungcheongnam-Do (KR)

(74)	Representative: Sajda, Wolf E. et al
	Meissner, Bolte & Partner GbR Postfach 86 06 24 D-81633 München D-81633 München (DE)

(54)	Magnesium-based alloy for high temperature and a manufacturing method thereof

(57) Provided is a manufacturing method of a magnesium-based alloy for high temperature. The manufacturing method includes melting a magnesium (Mg) or magnesium alloy into a liquid phase, adding calcium oxide (CaO) 1.4 times the weight of a final calcium (Ca) target composition onto a surface of a melt in which the magnesium or the magnesium alloy is melted, forming a targeted amount of Ca in the magnesium or magnesium alloy through a reduction reaction between the melt and the added CaO. Specifically, the amount of Ca formed is in the range of 0.8 wt% to 2.4 wt%, and a final composition of the Mg alloy includes 6.0 to 8.0 wt% of aluminum (Al), 0.1 to 0.3 wt% of manganese (Mn), 0.2 to 0.3 wt% of strontium (Sr), less than 0.04 wt of zinc (Zn), less than 0.9 wt of tin (Sn), and a balance being Mg.

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