Development of Low Carbon Microalloyed Bainitic Steels for Structural Plate Applications

D. Ormston; Volker Schwinn; Klaus Hulka

doi:10.4028/www.scientific.net/MSF.500-501.573

Paper Titles

Thermomechanically Hot Rolled High and Ultra High Strength Steel Grades - Processing, Properties and Application
p.543

Development of Low Carbon Microalloyed Ultra High Strength Steels
p.551

Application of Nb-O Affinity in Clean Steel
p.559

Development of NbTiB Microalloyed HSLA Steels for High-Strength Heavy Plate
p.565

Development of Low Carbon Microalloyed Bainitic Steels for Structural Plate Applications
p.573

Influence of Severe Accumulative Rolling in a Low Carbon Microalloyed Steel
p.581

Development of Process Technology for Vanadium Containing, High-Strength, Low-Carbon, Heavy Plate and Its Trial Manufacture
p.589

Influence of Deformation and Coiling Temperature on Mechanical Properties of a High Strength Pipeline Steel
p.597

The Effect of Thermomechanical Processing on the Structure and Mechanical Properties of Ni, Nb and V-Bearing HSLA Steels
p.605

HomeMaterials Science ForumMaterials Science Forum Vols. 500-501Development of Low Carbon Microalloyed Bainitic...

Development of Low Carbon Microalloyed Bainitic Steels for Structural Plate Applications

Abstract:

Steels with bainitic microstructures show the capacity to fulfil the requirements of high strength and low temperature toughness necessary for plate steels in specialised industrial constructions. The introduction of steels with higher strength allows for weight reductions of steel constructions. This paper investigates the development of hot rolled structural plate steels through laboratory hot rolling simulations of thermo-mechanically controlled processes (TMCP). Specific alloying and microalloying along with an optimised TMCP process has allowed high tensile properties to be achieved in combination with high levels of toughness. Tensile strengths of up to 900 MPa have been achieved with Charpy V-notch toughness greater than 200J at –40°C. Elements such as molybdenum, niobium and boron have been added to low carbon steels to promote the formation of fully bainitic microstructures with much lightened chemical compositions. The presented concepts allow the production of steel grades above S500 up to S690.

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Periodical:

Materials Science Forum (Volumes 500-501)

Pages:

573-580

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.500-501.573

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Online since:

November 2005

Authors:

D. Ormston, Volker Schwinn, Klaus Hulka

Keywords:

Bainite, Boron, Niobium, Thermo-Mechanically Controlled Processes, Toughness

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