CO/CO2气氛下Fe-C合金气固反应脱碳

Gas-solid reaction decarburization of Fe-C alloy in CO/CO

为研究Ar-CO-CO2气氛下Fe-C合金薄带的脱碳效果,通过热力学分析结合试验,确定脱碳气氛条件混合气体流量为850mL/min,CO的体积分数为25%,PCO2/(PCO+PCO2)为0.26。以初始碳质量分数为4.2%左右的Fe-C合金薄带为研究对象,探索不同脱碳温度、薄带厚度、脱碳时间对脱碳效果的影响。研究结果表明,对厚度为2mm的Fe-C合金薄带,脱碳温度分别为1 293、1 353、1 413K,脱碳60min后,平均碳质量分数分别为2.748%、1.870%、1.134%。厚度分别为1、1.5、2mm的Fe-C合金薄带,脱碳温度为1 413K,脱碳时间为60min,对应的碳质量分数分别为0.32%、0.92%、1.05%。证明提高脱碳温度、延长脱碳时间、减少薄带厚度均有助于提高脱碳效果。

In order to study the decarburization effect of Fe-C alloy strips in Ar-CO-CO2 atmosphere,the decarburization atmosphere was determined by a combination of thermodynamic analysis and experiments.The Fe-C alloy strips were decarburized in mixed 66.25%Ar-25%CO-8.75 CO2 gas.Taking the Fe-C alloy strip with an initial carbon content of 4.2% as the research object,the effects of different decarburization temperature,strip thickness and decarburization time on the decarburization effect were studied.The results show that for 2 mm Fe-C alloy strips which were decarburized for 60 min at 1 293,1 353,and 1 413 K,the average carbon content were 2.748%,1.870%,and1.134%,respectively.The Fe-C alloy strips with thicknesses of 1,1.5 and 2 mm were decarburizated at 1 413 Kfor60 min,the average carbon contents were 0.32%,0.92%and 1.05%respectively.It has been proved that increasing the decarburization temperature,prolonging the decarburization time and reducing the thickness of the strip all help to improve the decarburization effect.