製鋼過程に於ける非金属介在物の定量法及除去法 II : 非金属介在物の擧動並に除去法の研究

概要

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1. The author measured the change of inclusions in the processes of refining in acid and basic open-hearth or electric are furnace. The inclusions are assorted as follows. (1) Inclusion coming from outside. (2) Inclusion in metal. (3) Inclusion which occur during solidification. 2. In case of acid open-hearth process, we must keep an eye upon a large quantity of inclusions which came from outside or those occured in solidification. 3. Ordinary method for eliminating non-metallic inclusions are as follows. (1) Prevention of inclusions coming from hearth. (2) Elimination of oxygen in metal. (By ingenious utilization of deoxidation with silicon.) (3) Decreasing oxidizing power of slag. (Making heavy slag in the final process of refining.) (4) Preventing from mixing of fire-clay and oxidizing by air after tapping. (5) Control of constituents in metal. (Increasing both manganese and silicon and ingenious utilization of alminum, ) (6) Active elimination of inclusions in metal. (Utilization of agent which eliminate inclusion as Fe-Mn slag or CaF_2) 4. The author has also investigated some special points of eliminating inclusions in each steel making process.
社団法人日本鉄鋼協会の論文
1949-12-25