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| Experiment of gas-solid decarburization process of 1 mm Fe-C alloy ribbon |
| LI Ya-qiang，AI Li-qun，LI Qiang，CHENG Rong，CHEN Peng-fei，LIU Xin-liang |
| （College of Metallurgy and Energy，North China University of Science and Technology，Tangshan 063009，Hebei，China） |
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Abstract Focus on the study of decarburization behavior of 1 mm iron-carbon alloy ribbons with carbon mass content of 4.2%，a series of gas-solid reaction experiments at different temperatures were carried out. The impact of different temperatures on the decarburization of Fe-C ribbons and the dynamics of decarburizing process were investigated with the atmosphere of Ar-H2-H2O mixed gas，the gas flow rate was set as 400 mL/min，and the ratio of[PH2O/PH2]was 0.85. The results showed that rising decarburizing temperature can improve the decarburization rate effectively. For example，the carbon content decreased to 0.12% after 30 min decarburization at 1 413 K. Apparent decarburizing process can be concluded as nearly first-order reaction. Apparent activation energy of the decarburizing process calculated is 157.9 kJ/mol. The surface gas-solid chemical reaction is the controlling step in initial decarburizing stage and then，the diffusion of carbon in ribbon bulk is the main controlling step in the following process.
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Received: 15 July 2016
Published: 04 May 2017
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2017, Vol. 52 
