The ageing of aluminium alloy as I take the piece to a phamu baking temperature. When you reach the temperature set, remove from stove and cool down in the water. After that, contrary to the sandpaper belt to adjust the grill is simple disruption. And leave at room temperature for a period, and then bring the test measuring the hardness. Why leave it at room temperature at various times to compare the strengths of each time leave. Thereafter, the parts that are left at room temperature for a period equal to kiln per 1 minute, 1 hour, 2 hours and 4 hours to do a comparison of the strength to the time it takes to bake by the ageing precipitation is a piece of work to increase in strength after dropping left at room temperature by the hardness is increased slowly over time that keep emissions and when baking per the hardness increases rapidly by the hardness is increased according to the baking time.
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