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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 2    April 2002

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Hereditary effect of Al-based modifiers
and grain refiners on structure and
properties of A356.2 alloys
LI Pei-jie(李培杰)1, ZHANG Yan-fei(张燕飞)1, V.I.Nikitin2 ,
E.G.Kandalova2, K.V.Nikitin2

1.Department of Mechanical Engineering,
Tsinghua University, Beijing 100084, China;
2.Physical and Technological Department,
Samara State Technical University, Samara 443010, Russia

Abstract:The hereditary effect of Al-Ti, Al-Ti-B, Al-Sr master alloys on the structure and properties of A356.2 alloys was investigated, and comparison analysis between the master alloys used in the foundry industry and the fine-crystalline grain refiners produced by technologies of Samara State Technical University was conducted. The results show that less than 0.5% additions of FCR master alloys can promote 8%~20% in the elongation of as-cast A356.2 alloys. FCR additives are more efficient in comparison with conventional grain refiners and modifiers. Their effectiveness depends on their genetic effect of their finer structures.

 

Key words: master alloys; hereditary effect; grain refinement

ISSN 1672-7029
CN 43-1423/U

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