4. Conclusion

The physical and mechanical properties of cast irons depend on the material's microstructure. This microstructure is determined by the way the various cast irons are produced. The foundryman has a number of melting processes at his disposal to obtain the liquid material. All liquid state treatments (deoxidation, desulfurization, spheroidization, inoculation) are subject to precise instructions. The choice of charges and melting method, and compliance with these instructions, enable us to produce a liquid cast iron which, after solidification, will supply castings meeting the designer's specifications under very favorable economic conditions, which strongly justifies the use of cast irons for a large number of applications. The methodical application of instructions and controls carried out in the melting zone enable us to obtain quality liquid cast iron, so as to avoid rejects before assembly...