鐵鋼の分光分析用試料採取並に調製法の研究

概要

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Sampling on the quantitative spectrographic analysis of the silicon, manganese, nickel, chromium and copper contained in iron and steel was improved so as to apply it to the daily work. By this investigation the authors could obtain practically satisfactory results in view of speed and accuracy of the test. The results obtained were as follows 1) The authors designed two methods for sampling of molten steel. One was to cast in to a metal mold directly from the nozzle of ladle, and another was to pour into a metal-mold indirectly from the spoon. 2) The former metal-mold was used for the molten pig iron, and the core drill (7mm diameter) was designed for the grey pig iron. 3) The best condition for the discharge was to use the nipple-point type. (1.5mm diameter, 60∿80° angle) 4) Local analysis was made easy by applying wax and punch to symmetric surfaces. Metallic zinc was applied to the symmetric electrode. 5) According to the application of the above-described sampling method, the time required for the analysis was shortened, and at the same time reproducibility was improved to 2∿5%.
社団法人日本鉄鋼協会の論文
1954-06-25