REDUCING THE HARMFUL ACTION OF PHOSPHORUS IN FERROCARBON ALLOYS BY ALLOYING

General principles for neutralizing the harmful effects of phosphorus are outlined. Instead of deep dephosphorization, phosphorus contents o f less than 0.2 mass % in the melt are recommended. To avoid brittlene ss, the phosphorus may be bound in binary or ternary phosphide phases: Fe-alloying element-P; this sharply reduces the solubility of phospho rus in alpha and gamma iron. Thermodynamic data and experimental resul ts confirm these principles.