Metallurgical analysis for producing cast iron and steel

ABSTRACT

During production and just before pouring, the producer of cast iron and steel has to take specimen to find out how far the product compositions satisfys the costomer's requirements. Accordingly, some additions to the charge become necessary for adjustment. This process may be repeated till the quality satisfies the customer's requirements. Depending on the charge components used, the adjustment process may be too long, increasing the production time and cost. The present paper deals with metallurgical analysis of producing cast iron and steel with the aim of finding way to predetermine the optimum type and amount of charge components that satisfy the specific quality of cast iron and steel. In this paper, the metallurgical operations that takes place in the foundry furnaces and the common metallurgical processes have been analysed and illustrated in a logical sequence. The results of the analysis are given in schematic chart diagrams, which show the metallurgical inter-relationship between the input and output substances, and the influence of the operation time on the carbon and impurity content, and thus on the quality of cast iron and steel. A flow chart is worked out and illustrated that gives the possibility of the predetermination of optimum charge, saving production time and cost