Purification and hypercooling of Fe-B eutectic alloy

Adopting the molten glass denucleating technology combined with high frequency vacuum melting and cycle superheating, the main factors affecting purifying of the bulk Fe-rich side Fe-B eutectic alloy melt were investigated. The optimized purification and parameters for high undercooling and hypercooling were given out. The hypercoolings of 300-460 K have been obtained successfully in bulk Fe₈₃B₁₇ eutectic alloy melts, and 485 K in Fe₈₀B₂₀ hypereutectic alloy melts. So the primary nucleation undercoolings of 0.3T_m-0.4T_m were obtained in bulk Fe-B eutectic system alloy melts. The thermodynamic characters of hypercooling rapid solidification were also discussed by analyzing the cooling curves.