Experimental study of Gas-solid Decarburization process of 1.5 mm Fe-C Alloy Ribbon
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摘要: 为了研究1.5 mm厚的铁碳合金薄带固态下的脱碳规律, 试验以初始碳质量分数为3.2%, 1.5 mm厚的铁碳合金薄带作为研究对象, 通过在真空气氛脱碳炉内通入一定比例的Ar-H2-H2O混合气体营造出弱氧化性气氛, 在保证铁基体不发生氧化的前提下, 分别将试样加热到1 293、1 353、1 413 K保温脱碳10~50 min, 以气-固反应的形式对薄带进行脱碳处理。试验结果表明:脱碳反应近似为一级反应, 反应活化能为111.9 k J/mol;脱碳温度的高低对脱碳效果影响显著, 拟合得出1.5 mm厚的薄带最终碳含量随时间变化的计算式为wt=3.2e((0.196 12-1.62×10-4T)t。Abstract: In order to investigate the decarburization law of 1.5 mm thick iron-carbon alloy strip,an iron carbon steel strip with initial carbon mass fraction of 3.2% was used and placed into a decarburization furnace under weak oxidizing atmosphere created by Ar-H2-H2O mixed gas and heated. The samples were heated to 1 293 K,1 353 K and 1 413 K with holding time of 10~50 minutes respectively for the decarburization treatment via gas-solid reaction.the sample.The results show that the decarburization reaction is a approximate first-order reaction,and the activation energy is 111.9 kJ/mol.The decarburization temperature has a significant effect on the decarburization effect.The final carbon content as function of holding time can be expressed as wt=3.2e((0.196 12-1.62×10-4T)t.
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