<Original Papers>On the Determination of Oxygen in Steel by the Vacuum Fusion Method

Though several different methods have hitherto been proposed as an analytical method of oxygen in steel, the application of the vacuum fusion method is popular from the viewpoint of the determination of total oxygen content in steel. But, in using this method, some difficult problems in experimental technique remain to be solved. In measuring the distribution of oxygen between molten oxide slag and molten steel, the authors found it necessary to determine the oxygen content in steel. Therefore, the authors constructed the analytical apparatus of gas in steel by the vacuum fusion method using vacuum carbon spiral furnace, and analyzed oxygen contents in some steel samples. After the vacuum furnace was dead burned at 1,940℃ for about 5 hours, the blank values of this apparatus ranged 0.03-0.015cc/15min and satisfactory analytical values of oxygen in steel were obtained