Microalloy smelting process for aluminum-magnesium-silicon aluminum alloy
A technology of micro-alloying and aluminum alloy, which is applied in the field of micro-alloying smelting process of aluminum-magnesium-silicon-based aluminum alloys, can solve the problem that it takes a long time for silicon element to dissolve, diffuse and absorb, and magnesium element needs a long time for dissolution and diffusion. Time, slow dissolution and diffusion of silicon elements, etc., to achieve good alloying effect, reduce insoluble hard points and slag content, and improve the effect of grain refinement
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Embodiment 1
[0018] Embodiment 1: The composition of the 6063 aluminum alloy of the present invention includes: Si: 0.38-0.42%, Mg: 0.5-0.55%, Fe≤0.20%, Ti: 0.010-0.015%, and the balance is aluminum. (1) Transfer 11 tons of electrolytic aluminum liquid into the melting furnace, add 3 tons of solid cold material (Al99.70 remelted aluminum ingot), and adjust the temperature of the aluminum liquid to 740°C; (2) Transfer 700Kg of electrolytic aluminum liquid into the intermediate frequency Induction furnace, add 95Kg industrial silicon, turn on the power supply and heat for 20-30 minutes, the intermediate frequency induction furnace will rapidly heat up and rely on its own electromagnetic stirring to promote the dissolution, diffusion and absorption of silicon, ensuring the prepared AlSi12 liquid master alloy (hereinafter referred to as AlSi12 aluminum liquid) composition uniformity; (3) AlSi12 aluminum liquid is refined; the refining temperature is 730-750 ° C, and the refining agent (the grad...
Embodiment 2
[0019] Embodiment 2: The composition of the 6005 aluminum alloy of the present invention includes: Si: 0.75-0.80%, Mg: 0.5-0.55%, Fe≤0.20%, Ti: 0.010-0.015%, and the balance is aluminum. (1) Transfer 11 tons of electrolytic aluminum liquid into the melting furnace, add 3 tons of solid cold material (Al99.70 aluminum ingot), and adjust the temperature of the aluminum liquid to 740°C; (2) Transfer 990Kg of electrolytic aluminum liquid into the intermediate frequency induction furnace , add 135Kg industrial silicon, turn on the power supply and heat for 30-40 minutes, and prepare AlSi12 liquid master alloy (hereinafter referred to as AlSi12 aluminum liquid); The standard YS / T 491-2005 stipulates that the grade is RJ1-1), the dosage is 2Kg / T-Al, and the refining gas is argon with a purity of more than 99.99%; (4) Adjust the temperature of the AlSi12 aluminum liquid to 750°C; (5) Flush the AlSi12 aluminum liquid in the L-shaped launder for magnesium ingots (the addition of magnesiu...
Embodiment 3
[0027] Such as image 3 and Figure 4 As shown, the structure of the chute of the present invention includes a chute body, and the chute body includes a horizontal section chute 8, an inclined section chute 7 and a vertical section chute 6, and the horizontal section chute 8 and the vertical section chute The straight section launder 6 is respectively arranged at both ends of the inclined section launder 7, the other end of the horizontal section launder 8 is connected with the melting furnace 1, and the upper part of the launder body is provided with a heat preservation cover.
[0028] The heat preservation cover is hinged with the launder body, and the heat preservation cover is a segmented structure, including a horizontal upper cover 2, an inclined upper cover 3 and a vertical upper cover 4, and the horizontal upper cover 2, the inclined upper cover 3 and the vertical upper cover 4 are respectively arranged on the upper part of the horizontal section chute 8, the inclined...
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