Segregation of FeV80 Alloy by Electro-Aluminothermic Multi-Period Process

The microstructure and elemental distributions of FeV80 alloy were studied by SEM-EDS and FactSage software.The results show that the FeV80 alloy consists of the light grey basic phase（σ phase） and dark gray granular or acicular secondary phase（BCC-A2 phase）.And silicon as the impurity tends to precipitate in σ phase.Based on the industrial experiments,the macrosegregation of FeV80 alloy was also studied.All the alloy elements have different degrees of segregation affected by the melting point,density and solidification of the elements.Casting is in favor of the homogeneity of elements,and reducing cooling rate simultaneously is necessary to improve the macrosegregation significantly,with the major element vanadium having the maximum range and standard deviation respectively at 1.510% and 0.4714%,and sulfur（impurity element） having the minimum range and standard deviation respectively at 0.004% and 0.0017%.