1 mm铁碳合金薄带气-固反应脱碳试验

doi:10.13228/j.boyuan.issn0449-749x.20160316

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摘要为了研究1 mm铁碳合金薄带气-固反应脱碳动力学以及探索不同温度对薄带脱碳效果的影响。以初始碳质量分数为4.2%、厚度为1 mm的铁碳合金薄带为研究对象，在气体流量为400 mL/min、[pH2O/pH2]为0.85的Ar-H2-H2O混合气氛条件下，以高温气-固反应形式开展脱碳试验研究。结果表明，提高脱碳温度可以明显提高脱碳效果，在1 413 K温度条件下脱碳30 min可以将碳脱至0.12%。宏观脱碳反应近似为表观一级反应，脱碳反应表观活化能为157.9 kJ/mol。脱碳反应初期主要受控于表面化学反应，后期碳在薄带内部的扩散成为主要限制性环节。

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	李亚强

关键词 ：铁碳合金, 薄带, 气-固反应, 脱碳, 表观活化能

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.

收稿日期: 2016-07-15 出版日期: 2017-05-04

PACS:

TF746

引用本文:

李亚强，艾立群，李强，程荣，陈鹏飞，刘新亮. 1 mm铁碳合金薄带气-固反应脱碳试验[J]. 钢铁, 2017, 52(5): 19-23. LI Ya-qiang，AI Li-qun，LI Qiang，CHENG Rong，CHEN Peng-fei，LIU Xin-liang. Experiment of gas-solid decarburization process of 1 mm Fe-C alloy ribbon. Iron and Steel, 2017, 52(5): 19-23.

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