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材料工程  2002 

电磁场对离心铸造HastelloyC凝固组织的影响

Keywords: 电磁离心,Hastelloy合金,凝固组织,柱状晶-等轴晶转变

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Abstract:

研究了HastelloyC电磁离心铸管的凝固组织.结果表明,电磁离心铸造有利于等轴晶的生成,且随着磁场强度增加,等轴晶含量增多.这种柱状晶-等轴晶转变(CET)可解释为电磁场作用下,熔体流动,对枝晶产生冲刷进而折断.此外,电磁场可以细化微观组织,一次枝晶间距随着磁场强度增加而减小,其结果与Jackson-Hunt模型相一致.

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