A kind of method for preparing al-ti-c master alloy
A master alloy, al-ti-c technology, applied in the field of non-ferrous metal metallurgy and casting, can solve the problems of difficult to achieve large-scale production, uneven distribution of titanium, and high operator requirements, and achieve easy large-scale industrial production and continuous casting. The effect of continuous rolling is short, and it is not easy to aggregate and grow
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[0019] The present invention is a kind of preparation method of Al-Ti-C master alloy, and its steps are:
[0020] (1) Grinding and mixing potassium fluotitanate and graphite powder according to a preset ratio, and prefabricating aluminum core wire containing the mixture;
[0021] (2) The prefabricated aluminum core wire is connected to the negative electrode of the adjustable DC power supply or the adjustable current AC power supply, and the other end is connected to the graphite conductive rod or graphite conductive block;
[0022] (3) Control the temperature of the industrial pure aluminum liquid at 800°C-1000°C, and cover the surface of the aluminum liquid with cryolite or other slag remover; put the graphite conductive rod or graphite conductive block into the aluminum liquid in advance, and then put the prefabricated The flux cored wire is placed on the molten aluminum to generate an arc to melt the prefabricated aluminum flux cored wire, and the molten aluminum is contin...
Embodiment 1
[0031] (1) Mix potassium fluotitanate with a particle size of 550 mesh-600 mesh and graphite powder of 500 mesh-800 mesh at a ratio of 20% to 4.5% to make a drug core wire with a diameter of 10mm;
[0032] (2) Before continuous casting or pouring, the drug core wire and graphite rod (or block) are respectively connected to a power supply with a voltage of 25V and a current of 30A, and added to the pure aluminum liquid at 1000°C;
[0033] (3) After reaction, purification and impurity removal, continuous casting and rolling into 10mm alloy wire or continuous feeding of drug core wire in casting, the ingot is extruded into 10mm alloy wire.
[0034] like figure 1 , figure 2 As shown, the prepared Al-Ti-C master alloy was analyzed, and it was found that rods and bulk TiAl 3 , with a maximum size of 20 μm and a minimum size of 10 μm, small shiny TiC particles with a size of 1.3 μm.
Embodiment 2
[0036] (1) Mix 300-350-mesh potassium fluotitanate with 600-900-mesh graphite powder at a ratio of 25% to 5% to make a core wire with a diameter of 10mm;
[0037] (2) Before continuous casting or pouring, the drug core wire and graphite rod (or block) are respectively connected to a power supply with a voltage of 30V and a current of 45A, and added to the pure aluminum liquid at 950°C;
[0038] (3) After reaction, purification and impurity removal, continuous casting and rolling into 10mm alloy wire or continuous feeding of drug core wire in casting, the ingot is extruded into 10mm alloy wire.
[0039] Analyzing the prepared Al-Ti-C master alloy, it was found that rods and bulk TiAl 3, the largest size is 33 μm, the smallest size is 10 μm, and the size of small shiny TiC particles is 1.1 μm.
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