Method of preparing infusible hollow heteromorphic foam aluminum alloy by secondary foam
A foamed aluminum alloy and aluminum alloy technology, which is applied in the field of secondary foaming to prepare insoluble hollow special-shaped foamed aluminum alloys, can solve the problems that foamed aluminum special-shaped parts have not been reported, and achieve low cost, uniform pore structure, and method simple effect
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Embodiment 1
[0019] Step 1: Heat the aluminum alloy to melt, add calcium equivalent to 0.5% to 5% of the weight of the aluminum alloy to the molten aluminum alloy, stir evenly for 20 to 800 seconds to increase viscosity; then add calcium equivalent to the weight of the aluminum alloy Stir 0.5% to 5% titanium hydride at a speed of 800 to 5000r / m for 20 to 400 seconds, so that the titanium hydride is evenly mixed in the melt, and then put out the stirring blade;
[0020] The second step: quickly place the non-meltable ball in the foamed aluminum alloy melt and ensure that it is completely immersed in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in non-melting hollow spheres to obtain a secondary foamed aluminum alloy prefabricated part with a porosity lower than 65.5%;
[0021] Step 3: Heat the secondary foamed aluminum alloy preform with built-in non-melting balls to a temperature of 300°C to 650°C for 10 to 50 minutes, so that the alumi...
Embodiment 2
[0024] Step 1: Heat the aluminum alloy to melt, add calcium equivalent to 0.5% of the weight of the aluminum alloy to the molten aluminum alloy, stir evenly for 20 seconds to increase viscosity; then add 0.5% of the weight of the aluminum alloy to titanium hydride , stirring at a speed of 800r / m for 200 seconds, so that the titanium hydride is evenly mixed in the melt, and then put out the stirring paddle;
[0025] The second step: quickly place the non-meltable ball in the foamed aluminum alloy melt and ensure that it is completely immersed in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in non-melting hollow spheres to obtain a secondary foamed aluminum alloy prefabricated part with a porosity lower than 65.5%;
[0026] Step 3: Heat the secondary foamed aluminum alloy preform with built-in non-melting balls to a temperature of 300°C for 10 minutes so that the aluminum alloy preform can avoid the phenomenon of uneven pore ...
Embodiment 3
[0029] Step 1: Heat the aluminum alloy to melt, add calcium equivalent to 5% of the weight of the aluminum alloy to the molten aluminum alloy, stir evenly for 800 seconds to increase viscosity; then add titanium hydride equivalent to 5% of the weight of the aluminum alloy , stirring at a speed of 5000r / m for 400 seconds, so that the titanium hydride is evenly mixed in the melt, and then put out the stirring paddle;
[0030] The second step: quickly place the non-meltable ball in the foamed aluminum alloy melt and ensure that it is completely immersed in the melt to form a closed body. Rapid cooling of the primary foamed aluminum alloy melt with built-in non-melting hollow spheres to obtain a secondary foamed aluminum alloy prefabricated part with a porosity lower than 65.5%;
[0031] Step 3: Heat the above-mentioned secondary foamed aluminum alloy preform with built-in non-melting balls to a temperature of 650°C for 50 minutes so that the aluminum alloy preform can avoid the p...
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