Physical Metallurgy of Titanium Microalloyed Steel—Recrystallization and Phase Transformation
High-strength Ti microalloyed steels are mainly precipitation hardened ferritic steels. The good combination of ferrite grain refinement and TiC precipitation strengthening plays a key role in obtaining both high strength and high toughness simultaneously for those steels. The ferrite grain refinement, on the one hand, depends on the refinement of austenite grain size and on the other hand depends on the control of transformation temperature. The refinement of austenite grain size mainly depends on the control of the austenite grain growth before hot rolling, and the morphology and size of the recrystallized austenite grains during hot rolling.
KeywordsTitanium microalloyed steel Recystallization Austenite-to-ferrite transformation Grain refinement
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