日本金属学会誌

J. Japan Inst. Metals, Vol. 28, No. 2 (1964),
pp. 64-68

The Effects of Various Elements on the Solubility of Hydrogen in Liquid Pure Iron

Kôki Gunji1, Kiyoo Ono1 and Yoshiki Aoki1

1National Research Institute of Metals, Tokyo

Abstract:

In a previous report the solubility of hydrogen in liquid pure iron was determined with an improved hot-volume method. From the results, the authors judged it possible to measure the effects of various elements on the solubility of hydrogen in liquid pure iron with the same method, and examined the effects of chromium, vanadium, wolfram, molybdenum, nickel and cobalt. The experimental methods were quite the same as those in the previous experiments. According to the previous results, the completely water cooled reaction tube of fused quartz for the melting chamber, helium gas for the standard gas and thoria crucible for the meltingcrucible were used.
The results obtained were as follows:
(1) The solubility of hydrogen in liquid iron was increased by chromium, vanadium, and nickel. It was decreased by wolfram, molybdenum and cobalt.
(2) The effect of carbon on the solubility of hydrogen could not be determined owing to the reaction between thoria and dissolved carbon.
(3) The interaction parameters between each of the alloying elements and hydrogen dissolved in liquid iron in the temperature range from 1550°C to 1650°C were as follows:

}ll@{\hspace{4pt}}ll} eHCr = -0.0024 (Cr < 15%)
eHV = -0.0074 (V < 20%)
eHW = +0.0096 (W < 10%)
eHMo = +0.0029 (Mo < 10%)
eHNi = -0.0020 (Ni < 20%)
eHCo = 0.0000 (Co < 20%) \rs{8pt}{\Bigr} (from data by Matoba & Gunji)}


(Received 1963/7/13)

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