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- W1994200312 abstract "Electrolytic iron of a purity of 99.97 to 99.98 per cent was melted in fused magnesia crucibles in a modified Arsem furnace, forged into rods, machined, and annealed in an electric furnace according to various heat cycles. The magnetic properties were obtained by the Burrows double bar method. Determinations were also made of the electrical resistance, chemical composition, and physical properties, including microstructure and critical temperatures as well as tensile tests. A few commercial iron and steel samples were tested for comparison. The following valuable results were obtained: 1. Pure iron melted in an atmosphere of carbon monoxide under atmospheric pressure will absorb both carbon and oxygen with the result that the iron thus produced is of an inferior magnetic quality. 2. Low carbon iron melted in vacuo will lose 50 to 90 per cent of its original carbon content. 3. The magnetic quality of electrolytic iron melted in vacuo is decidedly superior to any grade of iron thus far produced, the maximum permeability obtained being 19,000 at a flux density of 9500 gausses. The average hysteresis loss obtained is less than 50 per cent of that found in the best grade of commercial transformer steel, due to the fact that the coercive force is very much lower than for silicon steel, although the retentivity is higher. 4. The specific electrical resistance of pure iron melted in vacuo is 9.96 microhms per centimeter cube. 5. Swedish charcoal iron melted in vacuo has a magnetic quality approximating that of electrolytic iron melted in vacuo, chiefly due to the reduction of the carbon content. The author suggests that the high electrical conductivity and hence large eddy current losses in this material may possibly be greatly reduced by the addition of silicon or aluminum without very materially affecting the magnetic quality." @default.
- W1994200312 created "2016-06-24" @default.
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- W1994200312 date "1915-02-01" @default.
- W1994200312 modified "2023-09-30" @default.
- W1994200312 title "Magnetic and other properties of electrolytic iron melted in vacuo" @default.
- W1994200312 doi "https://doi.org/10.1109/paiee.1915.6590756" @default.
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