On the Effect of Heat Treatment on the Mangnetic Properties or Iron-Aluminium alloys. II : The Change of Permeabilities, Intensity of Magnetization and Magnetic Hysteresis Loss Due to Quenching and a New Alloy "Alperm"
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概要
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The effect of water quenching on initial and maximum permeabilities, intensity of magnetization, magnetic hysteresis loss, coercive force and residual magnetic induction of iron-aluminium alloys has been measured with the forged and rolled specimens, and the relation between those changes and the quenching temperature and that between the former and the concentration of the alloys have been studied. For the alloys containing comparatively small amount of aluminium, no peculiar point has been observed on the curve of those properties to the quenching temperature and that of the former to the concentration of the alloys. However, in a considerably wide range of aluminium content of more than 8 percent, the curves of both permeabilities to the quenching temperature generally show a maximum and in the range of aluminium content of more than 11.64 percent two maxima. And both permeabilities remarkably increased, when the alloys in the Fe_3Al superstructure range were quenched from a temperature higher than the transformation temperature of the superstructure. From this fact, it is easily understood that the existence of the superstructure may be the cause of the increase of the permeabilities, as in the case of permalloy. The initial permeability of the alloy containing 13.92 percent of aluminium reached 3500 when it was quenched from 550° and the maximum permeability of the alloy of 15.29 percent of aluminium became as large as 34300 when quenched from 700° The effect of quenching on the magnetic hysteresis loss, coercive force and residual magnetic induction is inverse to that on the permeabilities. The smallest values of the loss and the coercive force are 70 ergs/cm^3/cycle and 0.02 Oe respectively, and are obtained when the alloy containing 14.87 percent of aluminium was quenched from 750° The effect of quenching on the maximum permeability of the rolled specimens is more remarkable than in the case of the forged specimens mentioned above. The largest values of the initial and the maximum permeabilities were obtained with the alloy containing 15.84 percent of aluminium, when it was quenched from 600°, and they are 3100 and 54700 respectively.
- 東北大学の論文
著者
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Masumoto Hakaru
The Research Institute For Iron Steel And Other Metals
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Saito Hideo
The Resarch Institute For Iron Steel And Other Metals
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