Masao Homma and Yasuhiko Hashimoto
The change of structure caused by a minute diffrence of oxygen content in Fe-C, Fe-Si-C and commercial grey cast iron was studied for a purpose regulating the oxygen content of each melt by covering it with specially prepared flux. The flux used acted as the oxidizing or reducing agent toward the melt. The alloy having a coarse flake graphite structure was used as a starting substance and its melt was subjected to the action of the flux. The relation between oxygen content and the structure of the alloy thus treated is shown in Table
From Table 2 it is to be noticed that similar cast iron structures are reguraly obtainable by reducing or increasing the oxyen content of the flake graphite-cast iron melt. The mechanism of formation of such structures is under discussion.
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