Influence of Atmosphere Condition on Iron Sheet Gas-solid Decarburization Process

The study of gas-solid reactions is performed in order to investigate the impact of weak oxidizing atmosphere Ar-H₂O-H₂ on the 1 mm thick 4. 25% C iron-carbon alloy sheet. A serious of orthogonal experiments have been performed to investigate the influence of bath temperature,initial H₂ content and gas flow on the decarburization of iron-carbon alloy ribbon.It is found out that the significance of gas flow,initial H₂ content and bath temperature on decarburization sequentially decrease.When gas flow rate is in range of 200 ~500 mL·min^-1,increasing flow rate can significantly improve the decarburization result.When water bath temperature exceeds 333 K,oxidation of iron takes place,and dense layer of Fe O appears when water bath temperature exceeds 343 K.Suitable parameters for the decarburization at 1 413 K are flowrate 500 mL·min^-1,15% H₂,bath temperature 333 K.