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Effect of Controlled-cooling on Structure and Mechanical Properties of New Type Bainitic Steel

Cheng Ju-qiang

Abstract

The effect of different cooling rate on microstructure and mechanical properties of new type bainitic steel were studied.The results show that new type bainitic steel have better properties after austenitizing when the cooling rate between 25℃/min～117℃/min,and the microstructure contain bainitic fenite and austenite; the new type bainitic steel has a higher toughness at slow cooling in bainitic transformation temperature range.

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Key concepts: Microstructure, Austenite, Materials science, Metallurgy, Continuous cooling transformation, Toughness, Bainite, Composite material