Device for preparing semi-solid alloy melt and process for preparing AlSi9Mg semi-solid alloy
A semi-solid and alloy technology, which is applied in the field of semi-solid alloy forming, rheological forming process, inclined cooling shear frequency conversion vibration device, can solve the problems that hinder large-scale popularization and application, heating temperature is difficult to control, and heating equipment is complicated. Achieve the effects of improving the solidification structure, simple structure, and increasing the probability of nucleation
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[0042] Example 1
[0043] The process for preparing semi-solid AlSi9Mg alloy melt or blank by utilizing the device for preparing semi-solid alloy melt of the present invention comprises the following steps:
[0044] The first step: put the aluminum-silicon alloy ingot and pure aluminum ingot into the resistance crucible boiler, and after all of them are melted, the temperature is raised to 690 ℃ ~ 710 ℃, and then the preheated aluminum-manganese master alloy is added.
[0045] The second step: at 680 ℃ ~ 700 ℃, press the pure Mg wrapped with aluminum foil into the alloy liquid, and the weight of Mg accounts for 0.4% of the weight of the alloy liquid.
[0046] The third step: after all the charge is melted, nitrogen refining is carried out at 700 ℃ ~ 720 ℃, and the degassing and slag removal of the alloy liquid is carried out.
[0047] The fourth step: after refining, the alloy liquid is heated to 720°C to 740°C for modification treatment, and the modification agent is sodium ...
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[0054] Example 2
[0055]In addition to the first to fifth steps of preparing the semi-solid AlSi9Mg alloy melt described in Example 1, the process for preparing the rheological die casting of the semi-solid AlSi9Mg alloy by using the device for preparing the semi-solid alloy melt of the present invention also includes: Follow the steps below:
[0056] A. Preheat the mold to 200℃~220℃, apply water-based or wax-based paint inside the mold, and connect the mold to the front end of the die-casting machine.
[0057] B. Adjust the position of the U-shaped cooling tank so that the liquid outlet end of the U-shaped cooling tank 10 is aligned with the material receiving port of the rheological die-casting equipment, and the prepared semi-solid alloy melt is directly poured into the pressure chamber of the rheological die-casting equipment.
[0058] C. Die-casting is performed under the conditions that the injection specific pressure is 40MPa-80MPa and the filling speed is 1.2m / s-2.5m...
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