Hot-Rolled TRIP Steels Based on Dynamic Transformation of Undercooled Austenite

Wang Yue Yang; Long Fei Li; Yun Yang Yin; Zu Qing Sun; Xi Tao Wang

doi:10.4028/www.scientific.net/MSF.654-656.250

Paper Titles

Hot Ductility of High Carbon Steel Produced by CSP
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Ultrafine Grained High Strength Low Alloy Steel with High Strength and High Ductility
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Mechanical Properties of Micro-Alloyed TRIP Steel
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Mechanical Properties of Hypereutectoid Steel with Microduplex (α+θ) Structure Formed by Hot Deformation of Undercooled Austenite
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Hot-Rolled TRIP Steels Based on Dynamic Transformation of Undercooled Austenite
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Effect of Thermomechanical Processing Parameters on the Microstructure Development in Low Si TRIP Steel
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Selective Oxidation and Sub-Surface Phase Transformation during Austenitic Annealing of TWIP Steels
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Effect of N on Microstructure and Tensile Behavior of TWIP Steel
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Hot-Working Behaviour of Advanced High-Manganese C-Mn-Si-Al Steels
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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Hot-Rolled TRIP Steels Based on Dynamic...

Hot-Rolled TRIP Steels Based on Dynamic Transformation of Undercooled Austenite

Abstract:

A novel thermomechanical process to manufacture hot-rolled transformation-induced plasticity (TRIP) steels was developed based on dynamic transformation of undercooled austenite (DTUA). Between DTUA and the isothermal bainitic treatment, only one-step controlled-cooling was required. The microstructure evolution of hot-rolled C-Mn-Si and C-Mn-Al-Si TRIP steels based on DTUA was investigated by hot uniaxial compression tests using a Gleeble1500 simulation test machine. The results indicated that during DTUA, the kinetics of ferrite formation was fast, the volume fraction of ferrite formed was determined by applied strain. In comparison with the process based on static transformation of austenite, a more uniform multiphase microstructure with fine ferrite grains was formed, the bainite packets were small and had relatively random orientations, the retained austenite distributed uniformly and had relatively high volume fraction. Hot-rolled TRIP steels based on DTUA demonstrated better mechanical properties, especially for C-Mn-Al-Si TRIP steel.

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Materials Science Forum (Volumes 654-656)

Pages:

250-253

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.250

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Online since:

June 2010

Authors:

Wang Yue Yang, Long Fei Li, Yun Yang Yin, Zu Qing Sun, Xi Tao Wang

Keywords:

Dynamic Transformation of Undercooled Austenite, Ferrite, Mechanical Property, Retained Austenite, TRIP Steel

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