ナトリウムおよびカリウムの炭酸塩-ハロゲン化物による溶融 18%Cr-4%C-Fe 合金の脱りん

概要

論文の詳細を見る
Molten 18%Cr-4%C-Fe alloy whose composition is close to the ternary eutectic one (m.p.=1150℃) was subjected to the treatment by alkali metal carbonate-halide fluxes at a temperature of 1300℃. Thermodynamically phosphates of potassium and sodium are very stable and their halides are expected to increase activity coefficient of chromium in the fluxes. From those considerations, various mixtures of carbonates and halides of sodium, potassium and calcium were examined for dephosphorization of molten high chromium alloy containing 0.1% phosphorus of 300g in weight. Higher dephosphorization was obtained with potassium carbonate than with sodium carbonate, and the best dephosphorization degree was 60% without appreciable chromium oxidation when 15g of potassium carbonate-potassium chloride or-potassium fluoride mixture was used.
社団法人日本鉄鋼協会の論文
1982-04-01