Abstract
The technologies for producing twinning induced plasticity (TWIP) blank in large scale with argon oxygen refining (AOD)-ingot casting-electroslag remelting (ESR) processes were studied. It was found that it was difficult to refine the low carbon Fe-25Mn-3Al-3Si TWIP steel using hot metal of high Mn content in AOD refining by a technology of decarburization and manganese retaining. However, it is practicable to perform decarburization and manganese retaining with the hot metal of lower Mn content in the early stage of AOD refining and do alloying with electrolytic manganese in the late stage. To overcome the problem of castability of TWIP steel, high superheat casting process was applied in ingot casting process, and the solidification structure of TWIP ingot was not compact and even, mainly composed of rough and long columnar and central random oriental dendrite. Due to the Ar protection and low current remelting processes applied in ESR procedure, the solidification structure was significantly improved and the inclusions were well controlled after ESR.
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Li, Kw., Zhuang, Cl., Liu, Jh. et al. Smelting and casting technologies of Fe-25Mn-3Al-3Si twinning induced plasticity steel for automobiles. J. Iron Steel Res. Int. 22 (Suppl 1), 75–79 (2015). https://doi.org/10.1016/S1006-706X(15)30142-4
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DOI: https://doi.org/10.1016/S1006-706X(15)30142-4