鋼申酸化物の分離法について
鋼中非金属化合物に関する研究-II
1962 年 48 巻 13 号 p. 1679-1684
詳細
1962 年 48 巻 13 号 p. 1679-1684
(1) In order to separate the oxide inclusions in carbon steel, such as aluminium-silicate, manganese-silicate or a alumina, the sample of steel is treate electrolytically in a neutral electrolyte and this residue is treated by chlorination method, and by this process, the oxide inclusions can be isolated fully. By chemical analysis of these oxide inclusions isolated, the quantities and chemical content of each oxide of various types can be known.
The shape and structure of oxide inclusions are examined after heating these residues at temperature between 500°C and 800°C in the air atmosphere and burning the amorphous carbon formed by the decomposition of the carbide during chlorination.
(2) Alcohloic-iodine method is applicable with satisfactory performance to the isolation of oxide inclusions, such as (Fe, Mn) O.Fe2O3 and (Fe, Mn) O, from the rimmed steel.
(3) In the case of isolation of oxide inclusions from high-Cr-Ni alloy-steels by electrolytic-and chlorination-method, the hydrated silica is formed by chemical reaction between ionic silicon and electrolyte.
This hydrated silica can be satisfactorily separated without decomposition of oxide inclusions by using 2.5% or 5.0% NaOH solution from the residues isolated electrolytically.
