Microstructure Refinement in Low Carbon High Manganese Steel through Ti-Mg Deoxidation

Abstract:

The low carbon high manganese steel (C: 0.07, Mn: 2.0, mass percentage) was deoxidized by Ti and Mg alloys, and its features of inclusion and microstructure were systemically studied. Through the scanning electron microscope (SEM) and Energy Dispersive X-ray Detector (EDX), it can be seen that in inclusions, the element of magnesium always coexists with titanium, and no single-phase oxides of magnesium are observed. After etching in 3Vol% natal solution, it’s found that the Mg-contained and Ti-contained inclusions can act as nucleation sits for the intragranular acicular ferrite. These results imply that besides the pinning effect, the oxide of magnesium can also participate in the nucleation for intragranular acicular ferrite. Thus, it may be used in the oxide metallurgy to refine the ferrite microstructure.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 1640-1644
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.1640
• Online since: February 2012
• Authors: Hui Kong, Wei Dai, Shuai Shao, Qiang Yue, Jiang Xing Zhu, Hu Cheng Yao, Bin Zheng Gan
• Keywords: Intragranular Acicular Ferrite, Oxide Inclusion, Oxide Metallurgy

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