Method for preparing foamed aluminium alloy product by secondary foaming
A foamed aluminum alloy and foaming technology, which is applied in the field of secondary foaming to prepare foamed aluminum alloy products, can solve the problems of high cost and unstable process, and achieve the effects of high cost, simplified process and simple method.
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Embodiment 1
[0042] Embodiment 1 A method for preparing foamed aluminum alloy products through secondary foaming, comprising the following steps:
[0043] Step 1: Heat the aluminum alloy to melt, and adjust the temperature to 630°C-680°C, add calcium equivalent to 0.5%-5% of the weight of the aluminum alloy to the molten aluminum alloy, stir for 1-30 minutes, and then add Titanium hydride equivalent to 0.5%-5% of the weight of the aluminum alloy, stirring to distribute the titanium hydride evenly in the melt, cooling the stirred melt, and obtaining a primary foamed aluminum alloy preform with a porosity lower than 70%;
[0044] Step 2: Put the above-mentioned primary foamed aluminum alloy prefabricated part with a porosity lower than 70% into the mold, and keep it warm at a temperature of 700°C to 1200°C for 3 to 40 minutes, so that the primary foamed aluminum alloy preformed Secondary foaming in the mould, cooling the foamed aluminum alloy to obtain a foamed aluminum alloy product.
Embodiment 2
[0045] Embodiment 2 A method for preparing foamed aluminum alloy products through secondary foaming, comprising the following steps:
[0046] Step 1: Heat the aluminum alloy until it melts. Among them, aluminum alloys such as ZL101, ZL102, ZL111 series alloys, or cast aluminum-copper alloys, grades such as ZL201, ZL202, ZL205 series alloys, or alloys mainly containing copper or Mainly deformed aluminum alloys containing silicon, can also be aluminum alloys containing magnesium, such as ZL301, etc., adjust the temperature to 630°C-680°C, and the temperature can be 635°C, 642°C, 650°C, 660°C, 665°C, 670°C , adding calcium equivalent to 0.5%-5% of the weight of the aluminum alloy to the molten aluminum alloy, the amount of calcium added can be selected as 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2%, 4.7%, stirring for 1-30 minutes, the stirring time can be selected as 3 minutes, 8 minutes, 10 minutes, 15 minutes, 22 minutes, 25 minutes, the stirring speed can be 300-600rpm, and then...
Embodiment 3
[0049] Embodiment 3 A method for preparing foamed aluminum alloy products through secondary foaming, comprising the following steps:
[0050] Step 1: Heat the aluminum alloy until it melts. Among them, aluminum alloys such as ZL101, ZL102, ZL111 series alloys, or cast aluminum-copper alloys, such as ZL201, ZL202, ZL205 series alloys, or mainly copper-containing or mainly Silicon-containing deformed aluminum alloy, adjust the temperature to 630°C-680°C, the temperature can be 635°C, 642°C, 650°C, 660°C, 665°C, 670°C, add 0.5%-5% of the weight of the aluminum alloy Calcium to the aluminum alloy melt, the addition of calcium can be selected as 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2%, 4.7%, stirring for 1-30 minutes, the stirring time can be selected as 3 minutes, 8 minutes, 10 minutes, 15 minutes, 22 minutes, 25 minutes, the stirring speed can be 300-600rpm, and then add titanium hydride equivalent to 0.5%-5% of the weight of the aluminum alloy, the amount of titanium hydride ca...
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