【摘 要】
：
By cyclic superheating incorporated with glass fluxing denucleation method the Fes2Bl7Si1 eutectic al-loy was undercooled up to △ T = 342 K. The relations betw
【机 构】
：
State Key Laboratory of Solidification Processing
论文部分内容阅读
By cyclic superheating incorporated with glass fluxing denucleation method the Fes2Bl7Si1 eutectic al-loy was undercooled up to △ T = 342 K. The relations between recalescence behavior and solidification structures weresystematically studied in the undercooling range of 6-342 K. Two critical undercoolings were observed: mixed eutecticwas the unique growth morphology when the undercooling was less than △T1 = 63 K; but the microstructure transformedto complete undercooled anomalous eutectic when the undercooling was greater than △T2 = 164 K. The two eutecticphases α(Fe,Si) and Fe2B conformed to the non-reciprocal nucleation effect. The boundary of the coupled zone of α(Fe, Si)-Fe2 B system shifted toward the Fe2 B side, and intersected the eutectic composition line at △ T = 154 K and△x T= 264 K, whose valley was at about △ T = 207 K.
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