Microstructure of electromagnetic stir cast grain refined iron base alloy

Electromagnetic stirring using multiple induction coils has been investigat ed as a method of preparing semisolid FC20 alloy. The effects of additions of titanium, zirconium, and boron on the microstructure of the FC20 alloy h ave also been studied. The electromagnetic flux density increased with inpu t voltage and was higher at the wall of the container than near the centre of the coil. The microstructure of the alloys varied with cooling rate: the higher the cooling rate, the smaller the particle size and the greater the degree of sphericity. The additions of titanium, zirconium, and boron also improved the alloy microstructure. (C) 2001 IoM Communications Ltd.