Silicon-aluminum alloy and preparation method thereof

[0017] Embodiment one

[0018] A silicon-aluminum alloy, containing the following components in weight percentage: 6% magnesium, 8% silicon, 0.05% iron, 0.05% copper, 0.02% manganese, 0.06% chromium, 0.08% nickel, 0.1% zinc, bismuth 0.02%, titanium 0.1%, and the rest is aluminum.

[0019] The manufacture method of described silicon-aluminum alloy is:

[0020] (1) Put aluminum, magnesium and silicon into the smelting furnace, heat it to 800°C in an environment filled with nitrogen to melt it into a melt, then add iron and copper to the melt with a gas carrier, and keep stirring at a constant temperature 8min, then adjust the temperature to 780°C, blow argon in the smelting furnace to refine the mixed melt for 15min, and remove the scum on the liquid surface to obtain a mixed melt;

[0021] (2) Send the mixed melt into the intermediate frequency furnace, raise the temperature to 1150°C, add manganese, chromium, nickel, titanium, zinc and bismuth, and keep it for 12 minutes, then send the material into the injection molding equipment, so that the alloy liquid flows into the atomization The device is atomized with high-pressure argon gas and deposited on the substrate to form an alloy ingot. During the atomization process, the atomization pressure is controlled to 1MPa, and the flow rate of the alloy liquid is 3kg/min. After the alloy ingot is cooled to room temperature, a silicon-aluminum alloy is obtained. finished product.

[0022] Embodiment two

[0023] A silicon-aluminum alloy, containing the following components in weight percent: 7% magnesium, 10% silicon, 0.08% iron, 0.09% copper, 0.06% manganese, 0.1% chromium, 0.1% nickel, 0.1% zinc, bismuth 0.02%, titanium 0.1%, and the rest is aluminum.

[0024] The manufacture method of described silicon-aluminum alloy is:

[0025] (1) Put aluminum, magnesium and silicon into the smelting furnace, heat it to 800°C in an environment filled with nitrogen to melt it into a melt, then add iron and copper to the melt with a gas carrier, and keep stirring at a constant temperature 4min, then adjust the temperature to 780°C, blow argon in the smelting furnace to refine the mixed melt for 16min, and remove the scum on the liquid surface to obtain a mixed melt;

[0026] (2) Send the mixed melt into the intermediate frequency furnace, raise the temperature to 1250°C, add manganese, chromium, nickel, titanium, zinc and bismuth, keep it for 12 minutes, then send the material into the injection molding equipment, so that the alloy liquid flows into the atomization The device is atomized with high-pressure argon gas and deposited on the substrate to form an alloy ingot. During the atomization process, the atomization pressure is controlled at 1.2MPa, and the flow rate of the alloy liquid is 3.5kg/min. After the alloy ingot is cooled to room temperature, silicon Finished aluminum alloy.

[0027] Embodiment three

[0028] A silicon-aluminum alloy, containing the following components in weight percentage: 10% magnesium, 16% silicon, 0.15% iron, 0.2% copper, 0.15% manganese, 0.25% chromium, 0.22% nickel, 0.5% zinc, bismuth 0.1%, titanium 0.2%, and the rest is aluminum.

[0029] The manufacture method of described silicon-aluminum alloy is:

[0030] (1) Put aluminum, magnesium and silicon into the smelting furnace, heat it to 805°C in an environment filled with nitrogen to melt it into a melt, then add iron and copper to the melt with a gas carrier, and keep stirring at a constant temperature 5min, then adjust the temperature to 780°C, blow argon in the smelting furnace to refine the mixed melt for 15min, and remove the scum on the liquid surface to obtain a mixed melt;

[0031] (2) Send the mixed melt into the intermediate frequency furnace, raise the temperature to 1200°C, add manganese, chromium, nickel, titanium, zinc and bismuth, keep it for 9 minutes, and then send the material into the injection molding equipment, so that the alloy liquid flows into the atomization The device is atomized with high-pressure argon gas and deposited on the substrate to form an alloy ingot. During the atomization process, the atomization pressure is controlled to 1.2MPa, and the flow rate of the alloy liquid is 3.1kg/min. After the alloy ingot is cooled to room temperature, silicon Finished aluminum alloy.