HEREDITY EFFECT OF MODIFICATION EFFICIENCY FOR Al-Sr MASTER ALLOY

Acta Metall Sin

1997, Vol. 33

Issue (6): 609-614 DOI:

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HEREDITY EFFECT OF MODIFICATION EFFICIENCY FOR Al-Sr MASTER ALLOY

BIAN Xiufang; LIU Xiangfa;WANG Xiane; MA Jiaji(Shandong University of Technology; Ji'nan 250061)

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BIAN Xiufang; LIU Xiangfa;WANG Xiane; MA Jiaji(Shandong University of Technology; Ji'nan 250061). HEREDITY EFFECT OF MODIFICATION EFFICIENCY FOR Al-Sr MASTER ALLOY. Acta Metall Sin, 1997, 33(6): 609-614.

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Abstract The Al-8.62% Sr master alloys with same composition but differentmicrostructures have different modification efficiency for Al-Si alloy. When Al-Sr ingot,corresponding to 0.1 %Sr in Al-Si alloy, or rapidly solidified Al-Sr sheet, coressponding to0.05%Sr in Al-Si alloy, was added, the modification rating of the eutectic Al-11 .8% Si alloyreaches class 5 at the condition of sand mold casting. At the permanent mold condition, bythe addition of Al-Sr ingot, corresponding to 0.06%Sr in Al-Si alloy, or rapidly solidifiedAl-Sr sheet, corresponding to 0.03%Sr in Al-Si alloy, the modification rating of the Al-Si alloy reaches class 6. It has been shown that the difference of the modification rating is attributed to the structural heredity effect.

Key words: Al-Si Al-Sr heredity effect modification rating

Received: 18 June 1997

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