METHOD FOR CONTROLLING MICROSTRUCTURE OF RECYCLED ALUMINUM ALLOY
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United States of America Patent
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May 16, 2019
app pub date -
Jan 14, 2019
filing date -
Jan 14, 2019
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Abstract
A method for controlling a microstructure of a recycled aluminum alloy includes steps of: degassing and removing inclusions from the molten aluminum alloy, refining grains and controlling the deformed microstructure. Good microstructures of the deformed aluminum alloy can be obtained after degassing by gas flushing, removing the inclusions by filtering, refining the grains by adding a modifier, and extruding or rolling or forging. The present invention provides desirable results of degassing and impurity removal. Contents of hydrogen and inclusions in the refined recycled molten aluminum alloy are 0.02-0.26 ml/100 g Al and 0.4-0.7 area % metallographic field respectively.
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