Studies on the Determination of Non-Metallic Inclusions in Iron and Steel. I : Determination of Non-Metallic Inclusions in Plain Carbon Steel and Silicon Steel

概要

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Non-metallic inclusions in iron and steel are usually determined by hot nitric acid, electrolytic or chlorine methods. The present authors studied the adaptabilities of these three methods in the analyses of plain carbon steel and silicon steel, and obtained the following results : In plain carbon steel, these methods were easily carried out but hot nitric acid method gave a lower value for silica than other methods, and electrolytic method gave a higher value for ferrous oxide and manganese oxide than other methods. After all, chlorine method was most convenient and accurate. Hot nitric acid and electrolytic methods gave somewhat higher value for silica in silicon steel, but if more chlorine would be passed than in the usual case, chlorine method would give correct results.
東北大学の論文