Method for preparing aluminum-yttrium intermediate alloy by using high intensity ultrasonic
A high-energy ultrasonic and master alloy technology, which is applied in the field of high-energy ultrasonic preparation of aluminum-yttrium master alloy, can solve the problems of difficult control of alloy composition, harm to human health, large fluctuation range, etc., and achieve stable rare earth content, convenient operation, and reduced energy consumption. Effect
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Embodiment 1
[0014] Example 1: First put the pure aluminum ingot into the crucible and heat it to melt, wrap the rare earth yttrium particles with a diameter of 20-100um in aluminum foil, press them into the above pure aluminum melt, and keep it warm at 725°C for 30 minutes, wherein The content of the rare earth yttrium accounts for 10% of the total weight, and the purity of the rare earth yttrium is 99.9%. Apply intermittent high-energy ultrasound at a place 10mm below the surface of the above alloy melt, with an ultrasound intensity of 0.3kw / cm 2 , the application time is 8min, the high-energy ultrasonic is applied for 30 seconds each time, and the intermittent time is 30 seconds, and then the alloy melt is lowered to 700°C for refining and impurity removal and casting.
Embodiment 2
[0015] Example 2: First put the pure aluminum ingot into the crucible and heat it to melt, wrap the rare earth yttrium particles with a diameter of 20-100um in aluminum foil, press them into the above pure aluminum melt, and keep it warm at 735°C for 40 minutes, wherein The content of the rare earth yttrium accounts for 15% of the total weight, and the purity of the rare earth yttrium is 99.9%. Apply intermittent high-energy ultrasound at a place 15mm below the surface of the alloy melt, with an ultrasound intensity of 0.4kw / cm 2 , the application time is 12min, the high-energy ultrasonic is applied for 40 seconds each time, and the intermittent time is 40 seconds, and then the alloy melt is lowered to 710°C for refining and impurity removal and casting.
Embodiment 3
[0016] Example 3: First put the pure aluminum ingot into the crucible and heat it to melt, wrap the rare earth yttrium particles with a diameter of 20-100um in aluminum foil, press them into the above pure aluminum melt, and keep it warm at 745°C for 40 minutes, wherein The content of the rare earth yttrium accounts for 10% of the total weight, and the purity of the rare earth yttrium is 99.9%. Apply intermittent high-energy ultrasound at a place 15mm below the surface of the alloy melt, with an ultrasound intensity of 0.5kw / cm 2 , the application time is 15 minutes, the application time of high-energy ultrasonic is 50 seconds each time, and the intermittent time is 50 seconds, and then the alloy melt is lowered to 710 ° C for refining and impurity removal and casting.
[0017] It can be seen that the eutectic structure of the obtained aluminum-yttrium master alloy structure is very uniform. When ultrasonic waves are introduced into the alloy melt, there will be many nonlinea...
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