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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 6    December 2001

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Effect of low temperature melt on solidification structure
of A356 alloy with melt thermal treatment
HE Shu-xian(何树先), WANG Jun(王  俊), SUN Bao-de(孙宝德), ZHOU Yao-he(周尧和)

School of Materials and Engineering, Shanghai Jiaotong University,
Shanghai 200030, P.R.China

Abstract: The influence of the low temperature melt (LTM) structure on solidification structure of the sample with melt thermal treatment (MTT) process was studied. And the mechanism of the MTT process was analyzed with cluster theory. It is shown that the final solidification structure is dependent mainly on the structure of LTM. Dendrites will appear in the solidification structure if the structure of LTM is dendritic before MTT. Otherwise, nondendritic grains will appear in the solidification structure. And the lower the temperature of LTM, the more remarkable the effect of the LTM structure is.

 

Key words:  aluminum alloy melt; solidification structure; MTT; cluster

ISSN 1672-7029
CN 43-1423/U

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