A casting aluminum alloy for high power density piston and its preparation method
A technology of casting aluminum alloy and high power density, which is applied in the field of casting aluminum alloy, can solve the problems of decreased alloy strength and poor comprehensive mechanical properties, and achieve the goals of improving heat resistance, good comprehensive mechanical properties, and improving structure and performance stability Effect
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Embodiment 1
[0039] The total mass of the aluminum alloy of this embodiment is 50kg, and the cast aluminum alloy used for high power density pistons includes the following components: Si: 11.5%, Cu: 3.5%, Mg: 0.9%, Ni: 2.5% by mass percentage %, Fe: 0.6%, Mn: 0.25%, Sc: 0.13%, Zr: 0.15%, Ti: 0.15%, V: 0.1%, and the balance is Al and unavoidable impurities. The mass ratio of Fe / Mn in the prepared aluminum alloy is 2.4:1, and the mass percentage of the high-temperature support strengthening phase is 6.2%.
[0040] The preparation method of the above-mentioned cast aluminum alloy comprises the following steps in sequence:
[0041] S1: Prepare ingredients: use pure aluminum ingots, pure magnesium ingots, AlSi30, AlCu50, AlNi20, AlFe20, AlMn10 and AlSc2, according to the mass percentage of each component of the aluminum alloy, and preheat the ingredients at 160 ° C and keep them warm for 30 ~60min; according to the alloy composition and stoichiometric ratio, calculate the amount of required ra...
Embodiment 2
[0051]The total mass of the aluminum alloy of this embodiment is 50kg, and the cast aluminum alloy used for high power density pistons includes the following components in terms of mass percentage: Si: 11.8%, Cu: 3.8%, Mg: 0.9%, Ni: 2.8 %, Fe: 0.6%, Mn: 0.28%, Sc: 0.13%, Zr: 0.15%, Ti: 0.15%, V: 0.1%, and the balance is Al and unavoidable impurities. The mass ratio of Fe / Mn in the prepared aluminum alloy is 2.14:1, and the mass percentage of the high-temperature support strengthening phase is 7.2%.
[0052] The preparation method of the above-mentioned cast aluminum alloy comprises the following steps in sequence:
[0053] S1: Prepare ingredients: use pure aluminum ingots, pure magnesium ingots, AlSi30, AlCu50, AlNi20, AlFe20, AlMn10 and AlSc2, according to the mass percentage of each component of the aluminum alloy, and preheat the ingredients at 160 ° C and keep them warm for 30 ~60min; according to the alloy composition and stoichiometric ratio, calculate the amount of req...
Embodiment 3
[0063] The total mass of the aluminum alloy in this embodiment is 50kg, and the cast aluminum alloy used for high power density pistons includes the following components: Si: 12%, Cu: 4.0%, Mg: 0.9%, Ni: 3.0 %, Fe: 0.6%, Mn: 0.28%, Sc: 0.13%, Zr: 0.15%, Ti: 0.15%, V: 0.1%, and the balance is Al and unavoidable impurities. The mass ratio of Fe / Mn in the prepared aluminum alloy is 2.14:1, and the mass percentage of the high-temperature support strengthening phase is 7.6%.
[0064] The preparation method of the above-mentioned cast aluminum alloy comprises the following steps in sequence:
[0065] S1: Prepare ingredients: use pure aluminum ingots, pure magnesium ingots, AlSi30, AlCu50, AlNi20, AlFe20, AlMn10 and AlSc2, according to the mass percentage of each component of the aluminum alloy, and preheat the ingredients at 160 ° C and keep them warm for 30 ~60min; according to the alloy composition and stoichiometric ratio, calculate the amount of required raw materials, and the ...
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