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AssigneeKorea Institute of Industrial Technology
InventorsShae K. KIM, Jung-Ho SEO
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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 6.0-8.0 wt % of aluminum (Al), 0.1-0.3 wt % of manganese (Mn), 0.2-0.3 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.
A method of manufacturing a magnesium-based alloy for high temperature, the method comprising:
A magnesium-based alloy for high temperature, characterized by that the magnesium-based alloy is manufactured by adding 0.5% to 4.0% by weight of CaO into a molten magnesium or magnesium alloy, and partially or wholly exhausting the CaO through a surface reduction reaction of the CaO, wherein the magnesium-based alloy contains a compound formed through combination of Ca with Mg or other alloying elements in the magnesium-based alloy to thereby have larger high-temperature mechanical properties as compared to a Mg alloy having the same composition manufactured by directly adding Ca.
A magnesium-based alloy for high temperature, characterized by that the magnesium-based alloy is manufactured by adding 0.5% to 4.0% by weight of CaO into a molten magnesium or magnesium alloy, and partially or wholly exhausting through a reduction reaction of the CaO,
A magnesium-based alloy for high temperature, characterized by that the Mg-based alloy is manufactured through addition of CaO into a molten magnesium or magnesium alloy and a surface reduction reaction of the CaO, wherein strength and elongation of room-temperature mechanical properties are increased at the same time as compared to a Mg alloy having the same composition manufactured by directly adding Ca.
Dependencies are inferred from the claim text.