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This article studies the effects of B 2 O 3 on the reduction of Fe content in scrap AZ91. The Fe concentration in a scrap can be decreased to less than 0.001wt.% when the scrap melt is refined by a B 2 O 3 -containing flux. Experimental results suggest that the best effect can be got when the B 2 O 3 addition is 0.61wt.% of the melt. Optimal process...
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