A coupled model of TiN inclusion growth in GCr15SiMn during solidification in the electroslag remelting process |
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Authors: | Liang Yang Guo-guang Cheng Shi-jian Li Min Zhao Gui-ping Feng Tao Li |
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Institution: | 1. State Key Laboratory of Advanced Metal urgy, University of Science and Technology Beijing, Beijing 100083, China;2. Dongbei Special Steel Group, Fushun 113001, China |
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Abstract: | TiN inclusions observed in an ingot produced by electroslag remelting (ESR) are extremely harmful to GCr15SiMn steel. There-fore, accurate predictions of the growth size of these inclusions during steel solidification are significant for clean ESR ingot production. On the basis of our previous work, a coupled model of solute microsegregation and TiN inclusion growth during solidification has been estab-lished. The results demonstrate that compared to a non-coupled model, the coupled model predictions of the size of TiN inclusions are in good agreement with experimental results using scanning electron microscopy with energy disperse spectroscopy (SEM-EDS). Because of high cooling rate, the sizes of TiN inclusions in the edge area of the ingots are relatively small compared to the sizes in the center area. Dur-ing the ESR process, controlling the content of Ti in the steel is a feasible and effective method of decreasing the sizes of TiN inclusions. |
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Keywords: | coupled model solidification inclusions bearing steel electroslag remelting |
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