With dusting machine , with high-purity nitrogen will be in addition to calcium injected into molten bath of aluminum, the diffusion in addition to calcium injected into the aluminum alloy powder with the chemical reaction of calcium and aluminum reactant liquid to leak out the surface , thereby in addition to calcium to achieve the purpose . in addition , with the exception of calcium and aluminum can in the reaction of magnesium , thereby lowering the concentration of? magnesium alloy ,so the exception of molten aluminum at first not to add calcium magnesium before .

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