2005•Research on Iron and SteelRequires access

STUDY ON CONTINUOUS COOLING TRANSFORMATIONFOR TITANIUM MICROALLOYED STEEL

Wang Guo-dong

Abstract

This paper studies the effect of Ti-addition on the continuous cooling transformation process of Ti microalloyed steel by means of a Gleeble-1500 thermal-mechanical simulator. Thermal expansion method was adopted to obtain the continuous cooling transformation curves under deformed and un-deformed conditions. The research results will provide theoretical basis for establishing TMCP processing of Ti microalloyed steel. Experiments showed that bainite can be formed during a wide range of cooling rates from 2℃/s to 20℃/s; Increasing Ti-addition makes γ-α transformation temperature upward and extends the cooling area to form ferrite. Moreover, in the condition of deformation, only ferrite and pearlite microstructure can be observed.

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Available abstract

Key concepts: Bainite, Materials science, Continuous cooling transformation, Pearlite, Ferrite (magnet), Microalloyed steel, Metallurgy, Microstructure