A kind of high-strength heat-conducting aluminum alloy material and preparation method thereof
An aluminum alloy material and high-strength technology, applied in the field of alloys, can solve problems such as strict smelting process requirements, low strength of aluminum alloy materials, and affecting work performance, and achieve the effects of reducing process difficulty, excellent mechanical properties, and reducing raw material costs
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[0035] The present invention provides a method for preparing a high-strength thermally conductive aluminum alloy material described in the above technical solution, comprising the following steps:
[0036] The aluminum ingot is smelted for the first time to obtain pure aluminum liquid;
[0037] Mix the pure aluminum liquid with zinc source, silicon source, iron source, copper source, manganese source, magnesium source, chromium source, nickel source, titanium source, lead source and strontium source, and carry out the second smelting to obtain alloy raw material liquid ;
[0038] refining the alloy raw material liquid to obtain a refined liquid;
[0039] subjecting the refined liquid to low-frequency electromagnetic stirring to obtain a semi-solid slurry;
[0040] The semi-solid slurry is cast into a mold and die-casted to obtain a high-strength heat-conducting aluminum alloy material.
[0041] In the invention, the aluminum ingot is first smelted to obtain pure aluminum li...
Embodiment 1
[0054] In terms of mass percentage, the chemical composition of the high-strength thermally conductive aluminum alloy material in this embodiment is: 16.1% zinc; 8.0% silicon, 0.3% iron, 2.1% copper, 0.1% manganese, 0.01% magnesium, 0.01% chromium, nickel 0.01%, titanium 0.01%, lead 0.01%, strontium 0.005%, aluminum 73.345%;
[0055] According to the above formula, adjust the temperature to 720°C, first add 50% of the total amount of aluminum ingots into the melting furnace, then heat up and half-melt, then add the remaining aluminum ingots to completely melt, after all the aluminum ingots are completely dissolved, keep warm 30min;
[0056] Adjust the temperature to 715°C, add silicon source, iron source, copper source, chromium source, nickel source, manganese source and titanium source to the pure aluminum liquid according to the above formula, and keep it warm for 4 hours. After they are all dissolved, add magnesium source, zinc source, lead source and strontium source, an...
Embodiment 2
[0061] In terms of mass percentage, the chemical composition of the high-strength thermally conductive aluminum alloy material in this embodiment is: 17.1% zinc; 9.0% silicon, 0.7% iron, 2.4% copper, 0.3% manganese, 0.1% magnesium, 0.1% chromium, nickel 0.1%, titanium 0.05%, lead 0.05%, strontium 0.04%, aluminum 70.06%;
[0062] According to the above formula, adjust the temperature to 740°C, first add 50% of the total amount of aluminum ingots into the melting furnace, then heat up and half-melt, then add the remaining aluminum ingots to completely melt, after all the aluminum ingots are completely dissolved, keep warm 20min;
[0063] Adjust the temperature to 725°C, add silicon source, iron source, copper source, chromium source, nickel source, manganese source and titanium source to the pure aluminum liquid according to the above formula, and keep it warm for 3 hours. After they are all dissolved, add magnesium source, zinc source, lead source and strontium source, and mel...
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