TiO_2 を含有する鑛滓による微細化黒鉛鑄鐵に關する研究 I

概要

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The conditions, necessary for the production of the cast iron having all eutectic graphites, were determined having the cast iron of common grade brought into contact with the slag of CaO-SiO_2-Al_2O_3 system containing TiO_2. It was found that about 0.2∿0.3% titanium was contained in the cast iron having all eutectic graphites, produced by the method above mentioned. This increase of titanium did not reduce the nitrogen content of the cast iron. The authors explained the reason why the graphites in the cast iron were refined under the slag treatment as follows : A great part of titanium contained in the molten cast iron presumably exist in the form of TiC. When the cast iron containing about 0.2∿0.3% titanium solidifies, a great number of minute TiC crystals disperse into the eutectic form containing cementite or graphite, barring the development of graphite crystals.
社団法人日本鉄鋼協会の論文
1952-03-25