Abstract
Many papers have been published on inoculation, but few of them refer the subject of the relation between metals and inoculants.
The authors made the investigation on this point using commonly used inoculants like Ca-Si and Fe-Si and have made the experiment on the temperature at inoculation, the grain size of the inoculants and its amounts. The results of the experiments concerning this relation shall be announced hereafter.
1) When the well refined metal containing 1.5%C was used, the inoculating efficieney of Ca-Si was very well at the temperature of more than 1500°C, but below this temperature it was great when Fe-Si inoculant was used.
2) When the metal of 2.5%C melted by ordinary method was used, the efficiency of inoculation of Ca-Si was much greater than that of Fe-Si even the temperature of the melt was around 1450°C.
3) The grain size of the both inoculants is preferable as 6∼12 mesh.
4) The favorable amount of the inoculant is 0.3∼0.5%.
5) Ca-Si inoculant gives particular effect on the growth of graphite to say nothing of dioxidation.
