2009•SteelmakingRequires access

Effect of cooling rate on the formation of acicular ferrite in Ti deoxidized steel

YU Guang-wen

Abstract

The microstructures obtained at different cooling rates were studied in the Ti deoxidized steel and the chemical composition was also analyzed by energy dispersive X-ray spectroscopy.The result shows that at the cooling rate of 8 ℃/s to 15 ℃/s,the acicular ferrites are formed within a temperature range of 500 ℃ to 800 ℃.The Ti-Al inclusions can induce nucleation of acicular ferrite and sympathetic nucleation as well,which make the acicular ferrite in steel interlocked and grains refined apparently.

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Key concepts: Acicular ferrite, Acicular, Nucleation, Materials science, Metallurgy, Ferrite (magnet), Microstructure, Continuous cooling transformation