鑄鐵中の酸素に關する一考察

概要

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In recent years, the effect of O_2 on the properties of cast iron has been studied, but the quantitative results are little. After war, by the hot blast cupola, we have been able to solve many troubles of the melting operation affected by the rough pig and coke. Sometimes we found some cracks in the gross casting of turbine, and assumed that these cracks were due to the lack of refining of pig. In the later research, we could confirm that FeO was an important factor which influenced the properties of pig as well as cast iron, and the following results were obtained. (a) The cupola metal melted by the rough pig includes a great deal of FeO. (b) In the gross casting made from the rough pig, the crack tends to appear. (c) When FeO≥0.04%, the repeated impact value decreases exceedingly. (d) When FeO≥0.05%, the graphite structure is abnormal. Above mentioned, FeO affected severely to the crack, the strength and the graphite structure. And we must inspect not only the chemical composition, but also the degree of refining of pig.
社団法人日本鉄鋼協会の論文
1951-07-25