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| Experiment of solid state decarburization process of 2 mm Fe-C alloy sheet |
| CHENG Rong1，AI Li-qun1，HONG Lu-kuo2，LI Qiang1，LI Ya-qiang1 |
1. College of Metallurgy and Energy，North China University of Science and Technology，Tangshan 063009，Hebei，China
2. State Key Laboratory of Advance Steel Processes and Products，Central Iron and Steel Research Institute，Bejing 100081，China |
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Abstract In order to study the law of solid phase decarburization reaction?of 2 mm Fe-C alloy sheets， the Fe-C alloy sheets were decarburized by introducing oxidizing gas of Ar-H2-H2O into the horizontal furnace for producing low carbon steel sheets. The Fe-C alloy sheets which initial carbon contents were 4.15% and 3.2%， were placed in heating atmosphere. Various heating temperature and decarburization time were investigated. The results showed that the diffusion of carbon to the reaction interface is the rate controlling step of the decarburizing process， and both higher decarburization temperature and longer decarburization time are beneficial to the decarburization process. The Fe-C alloy sheets which have different initial carbon content have the same decarburization rate in the early stage of the reaction. The Fe-C alloy sheet is so thick that the final carbon content can not meet the requirement， thus， a segmented heating decarburization process is proposed to serve this issue. This process has a positive influence on decarburization， and it is found that sheets with 0.28% C（mass percent） can be produced from sheets with initial 4.15% C（mass percent） and with the thickness of 2.0 mm through segmented heating decarburization process within 70 min， and sheets with 0.23% C（mass percent） can be produced from sheets with initial 4.15% C（mass percent） and with the thickness of 2.0 mm through segmented heating decarburization process within 50 min.
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Received: 21 September 2015
Published: 11 July 2016
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2016, Vol. 51 
