A scandium-containing cast aluminum-lithium alloy and a preparation method thereof
A technology for casting aluminum and lithium alloys, which is applied in the preparation of scandium-containing cast aluminum-lithium alloys and the preparation of cast aluminum-lithium alloys, can solve the problems of lack of research on cast aluminum-lithium alloys, low strength and elongation, and shoulder-to-shoulder strength. Effects of inhibiting grain growth and coarsening, reducing oxidation inclusions, and improving strength levels
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Embodiment 1
[0042] Preheat pure aluminum, pure magnesium and intermediate alloys Al-Cu, Al-Zr, Al-Sc to 180-225°C, then put pure aluminum into a graphite crucible to melt. After the aluminum ingot is melted, add the Al-Sc intermediate alloy at 760-770°C, stir evenly after it melts, add the Al-Cu intermediate alloy at 740-760°C, and after the temperature of the aluminum liquid rises to 750°C, add the Al-Zr Add the master alloy directly into the molten aluminum, stir evenly after melting and sprinkle the covering agent (LiF:LiCl=1:3~1:2) on the surface of the melt, and keep it warm for 15 minutes. Under the protection of argon, add Mg under the condition of 730-740°C, stir it fully after it melts, scrape off the surface slag and sprinkle it with covering agent; then press pure Li into the melt with a bell jar, keep argon flowing, After it is completely melted, stir evenly, scrape off the slag on the surface and sprinkle it with covering agent. After lowering the temperature of the melt to ...
Embodiment 2
[0052] First preheat pure aluminum, pure magnesium and intermediate alloys Al-Cu, Al-Zr, Al-Sc to 180°C-225°C, then put pure aluminum into a graphite crucible to melt. After the aluminum ingot is melted, add the Al-Sc intermediate alloy at 760-770°C, stir evenly after it melts, add the Al-Cu intermediate alloy at 740-760°C, and after the temperature of the aluminum liquid rises to 750°C, add the Al-Zr Add the master alloy directly into the molten aluminum, stir evenly after melting and sprinkle the covering agent (LiF:LiCl=1:3~1:2) on the surface of the melt, and keep it warm for 15 minutes. Under the protection of argon, add Mg under the condition of 730-740°C, stir it fully after it melts, scrape off the surface slag and sprinkle it with covering agent; then press pure Li into the melt with a bell jar, keep argon flowing, After it is completely melted, stir evenly, scrape off the slag on the surface and sprinkle it with covering agent. After lowering the temperature of the ...
Embodiment 3
[0062]Preheat pure aluminum, pure magnesium and intermediate alloys Al-Cu, Al-Zr, Al-Sc to 180-225°C, then put pure aluminum into a graphite crucible to melt. After the aluminum ingot is melted, add the Al-Sc intermediate alloy at 760-770°C, stir evenly after it melts, add the Al-Cu intermediate alloy at 740-760°C, and after the temperature of the aluminum liquid rises to 750°C, add the Al-Zr Add the master alloy directly into the molten aluminum, stir evenly after it melts and sprinkle the covering agent (LiF:LiCl=1:2) on the surface of the melt, and keep it warm for 15 minutes. Under the protection of argon, add Mg under the condition of 730-740°C, stir it fully after it melts, scrape off the surface slag and sprinkle it with covering agent; then press pure Li into the melt with a bell jar, keep argon flowing, After it is completely melted, stir evenly, scrape off the slag on the surface and sprinkle it with covering agent. After lowering the temperature of the melt to abou...
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