Preparation method of aluminum alloy die casting for riveting of new energy vehicle and die casting
A new energy vehicle, aluminum alloy technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve problems such as waste of resources and increase manufacturing costs, and achieve the effect of low solid gas content and good elongation
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[0019] The invention provides a method for preparing an aluminum alloy die-casting part for riveting a new energy vehicle, comprising:
[0020] S1, melting aluminum ingots into alloy liquid;
[0021] S2. Pouring the alloy liquid into a vacuum die-casting mold to make a blank;
[0022] S3, performing heat treatment on the blank.
[0023] Optionally, the aluminum ingot in step S1 adopts an aluminum ingot conforming to the DIN1706-2010 / EN AC-43500 standard, and the composition of the raw materials and the mass percentage of each composition are: Si: 9-11.5%, Fe: ≤0.2%, Cu: ≤0.05%, Mn: 0.4-0.8%, Mg: 0.1-0.6%, Zn: ≤0.07%, Ti: 0.1-0.2%, Sr: 0.01-0.027%, and the balance is Al and unavoidable impurities.
[0024] Optionally, the melting temperature in step S1 is 720-770°C.
[0025] After smelting, inert gas is introduced to remove oxides and hydrogen in molten aluminum, and AB double holding furnace is used to keep warm, which helps to reduce trace elements in the alloy (Mn: 0.4-0....
Embodiment 1
[0033] Smelting at a high temperature of 720°C, introducing inert gas to remove oxides and hydrogen in the molten aluminum, using AB double holding furnace for heat preservation, controlling the density index of the molten aluminum to be ≤0.05%; pouring the alloy liquid into a vacuum die-casting mold at a temperature of 690°C Die-casting is carried out inside; heat treatment is carried out on the semi-finished product, the temperature of heat treatment is 300 ℃, and the holding time is 4h.
[0034] The rest of the examples and comparative examples were prepared according to the method steps in Example 1, and the process conditions were summarized in Table 1.
[0035] The processing conditions of each embodiment of table 1
[0036]
[0037]
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