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| STUDY ON THE BEHAVIOR OF HYDROGEN IN STEEL HEAT TREATMENT PROCESS WITH PROTON CONDUCTOR SENSOR |
| LI Ying, DING Yushi, HU Jingtao, WANG Changzhen |
| College of Materials and Metallurgy, Northeastern University, Shenyang 110819 |
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Cite this article:
LI Ying DING Yushi HU Jingtao WANG Changzhen. STUDY ON THE BEHAVIOR OF HYDROGEN IN STEEL HEAT TREATMENT PROCESS WITH PROTON CONDUCTOR SENSOR. Acta Metall Sin, 2011, 47(5): 553-558.
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Abstract The dehydrogenation behavior in two steels during heat treatment process was investigated by using CaZr0.9In0.1O3-α proton conductor hydrogen sensor and electrochemical impedance spectroscopes of these steels have been measured and analyzed. Based on the changes of hydrogen partial pressure in these steels with temperature and with time at constant temperatures of 600℃ and 800℃, it is found that the dehydrogenation begins only when heat treatment temperature is higher than 600℃. Although this temperature exceeds higher than 727℃, the dehydrogenation behavior is not significantly improved. This means that the reasonable heat treatment temperature is in the range of 600-730℃. The experimental results show that the CaZr0.9In0.1O3-α proton conductor hydrogen sensor could be used to monitor in situ changes of partial hydrogen pressure during dehydrogenation of solid state steels as a suitable sensor.
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Received: 16 November 2010
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| Fund: Supported by National Natural Science Foundation of China (Nos.50774018 and 51074038) |
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