Influence of CO-CO₂ mixture on Gas-solid Decarburization Reaction of Fe-C Alloy Sheet

To investigate influence of CO-CO₂ mixture on the gas-solid decarburization reaction of Fe-C alloy sheet,the high carbon domain Fe-C alloy sheets with 1 mm the thickness was used to conduct decarburization reaction in weak oxidizing atmosphere（Ar-CO-CO₂）.The results show that the coverage rate of oxygen on surface of Fe-C alloy sheet decreases with increasing the flow rate of mixed gas.The higher coverage rate of oxygen is beneficial for decarburization.XRD analysis on decarburized surface shows that P_CO2/P_CO shall be less than 0.37 to make sure less Fe being oxidized in 1 413 K.At the given conditions,when the volume ratio of CO is 25%,the better decarburization effect can be achieved.Increasing the decarburization temperature and/or prolonging the decarburization time to a certain degree can improve the decarburization effect.