Paper Titles
On the Formation of a Non-Traditional Pearlite Morphology
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Graphitization Behavior of a Spray Formed Ultra High Carbon Steel during Hot Rolling
p.4550
Recrystallization and Spheroidization Behavior of High Carbon Pearlitic Steels Investigated by Means of Orientation Imaging Microscopy
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Refinement of Sub-Grain and Enhancement of Impact Energy Absorption for Ultra-High Strength Bainitic Steel
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The Ultra-Fine Bainitic Steels and Refinement Technology
p.4566
The Effect of Plastic Deformation on the Formation of Different Morphologies of Ferrite upon Cooling
p.4572
Three-Dimensional Observation and Growth Kinetics of Proeutectoid Ferrite Formed at Austenite Grain Boundary in a Low Carbon Microalloyed Steel
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Modeling the Effect of Austenite Grain Size Distribution on Austenite Decomposition Kinetics
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Modeling Austenite-to-Ferrite Transformation Kinetics in Low-Carbon Manganese Steels during Continous Cooling
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The Ultra-Fine Bainitic Steels and Refinement Technology

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Abstract:

By employing the new developed relaxation-precipitation-controlling phase transformation (RPC) technique in large scale production the bainitic steels with ultra fine bainite has been obtained. These bainitic steels have good synergistic properties. With the aid of thermal simulation the refinement mechanism of RPC technique has also been investigated. The optical microscope, scanning electron microscope, transmission electron microscope and Electron back scattering diffraction technique were employed to study the features of microstructure produced by RPC technique, precipitation and the evolution of dislocation configuration during the relaxation. The results show that when produced by RPC technique the microstructure of the steel is mainly ultra-fine lath bainite packets, and these bainite packets block each other. It is also found that during the relaxation the dislocation cells form and strain induced precipitation occurs, the dislocation cell pinned by the precipitates can confine the bainite transformation. After the relaxation during the cooling the acicular ferrite forms at first and in succeeding the bainite transformation is blocked by the acicular ferrite and the bainite is refined effectively.

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

4566-4571

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.4566

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Online since:

March 2007

Authors:

Xue Min Wang, Xin Lai He, Shan Wu Yang, Cheng Jia Shang

Keywords:

Refinement, Relaxation-Precipitation-Controlling Phase Transformation, Ultra-Fine Bainitic Steel

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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