Method for preparing magnesium matrix composite semisolid slurry by adopting ultrasonic in situ synthesis
A semi-solid slurry and composite material technology, applied in the direction of improving process efficiency, etc., can solve the problems of low strength of magnesium alloy, limited application range, poor high temperature creep resistance, etc., to achieve fine solid particles and simple process , low cost effect
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[0010] Example 1.
[0011] In this example, AZ91 alloy (Al 9.163, Zn 0.538, Mn 0.218, Si 0.042, Fe 0.0028, Cu 0.0053, Be 0.0007, Ni 0.0056, the remainder is Mg, mass fraction, the same below) as the matrix, the bulk Mg -Y master alloy is broken into small particles, wrapped in aluminum foil and preheated to 250℃ for later use. After the base alloy is melted, keep warm, add Mg-Y intermediate alloy, then adjust the furnace temperature to 850 ° C, turn off the power of the melting furnace, put the ultrasonic horn probe into the melt, ultrasonicate the melt, and then stop the ultrasonic wave. After the ultrasonic was stopped, the temperature was lowered to 584 °C, and the melt was ultrasonically vibrated by the continuous ultrasonic method to prepare the particle-enhanced Al 2 Y / AZ91 magnesium matrix composite semi-solid slurry. In order to prevent the alloy from oxidizing, a covering agent is used in the preparation process (the main components and mass fraction of the covering...
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[0012] Example 2.
[0013] In this example, AZ61 alloy (Al 6.0, Zn 0.538, Mn 0.218, Si 0.1, Fe 0.005, Cu 0.005, Ni 0.05, Others 0.3, the remainder is Mg, mass fraction, the same below) as the matrix, the bulk The Mg-Y master alloy is broken into small particles, wrapped in aluminum foil and preheated to 250°C for use. After the base alloy is melted, keep warm, add Mg-Y master alloy, then adjust the furnace temperature to 850 ° C, turn off the power of the melting furnace, put the ultrasonic horn probe into the melt, and ultrasonicate the melt. The temperature was lowered to 570 °C, and the melt was ultrasonically vibrated by the continuous ultrasonic method to prepare the particle-enhanced Al 2 Y / AZ61 magnesium composite semi-solid slurry. In order to prevent the alloy from oxidizing, a covering agent is used in the preparation process (the main components and mass fraction of the covering agent are: KCl is 45%, MgCl 2 45%, CaF 2 5%, BaCl 2 5%) and pass SF 6 and CO 2 mi...
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