溶融 Fe-C, Fe-Si, および Fe-C-Si 合金の電気抵抗

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The electric resistivity of molten Fe-C, Fe-Si, and Fe-C-Si alloys has been measured by the electrodeless, rotating field method. The results are summarized as follows. (1) The resistivity of pure iron shows a rise of about 5% in the process of melting and thereafter a linear increase with increasing temperature up to 1625℃. (2) For molten Fe-C alloys, the concentration range of measurement has been from 0.32∿4.22%, the temperature range being up to 1500∿1600℃. (a) The resistivity increases linearly with an increase of temperature. (b) The resistivity isotherm increases fairly steeply but monotonously with rising carbon content. (c) The temperature coefficient of resistivity exhibits a rapid fall at a concentration between 0.32% and 0.92%, showing little change at higher concentrations. (3) For molten Fe-Si alloys, the measurements have been made in the temperature range up to 1450∿1580℃ and in the whole concentration range. (a) The resistivity of the alloys with silicon content of more than 30at% shows a fall in the process of melting. (b) The resistivity shows a linear dependency on temperature. But the temperature coefficient of the alloys with silicon content of more than about 50at% is negative, except that of pure silicon. (c) The resistivity isotherm shows a large positive deviation from the so-called additivity law. (4) The resistivities of molten Fe-C-Si alloys with concentrations of 1 or 3% carbon and 2, 5, or 10% silicon have been measured in the temperature range up to 1450∿1580℃ with the result which is indicative of the possibility of the multiplying interaction of carbon and silicon on the resistivity of molten iron.
社団法人日本鉄鋼協会の論文
1974-12-01

溶融 Fe-C, Fe-Si, および Fe-C-Si 合金の電気抵抗

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