Effect of cooling rate on the microstructure and mechanical properties of high Ti-V microalloyed steel

High-strength low-alloy steels are known for their superior mechanical properties and these desired properties are achieved through controlled hot rolling. The cooling rate is one of the most important factors in controlled hot rolling, which plays a major role in the final microstructure and mechan...

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Bibliographic Details
Published inMATEC Web of Conferences Vol. 388; p. 6006
Main Authors Rezaei, Seyed Reza Jafarpour, Siyasiya, Charles W., Moema, Joseph
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 2023
Subjects
Cooling effects
Cooling rate
High strength low alloy steels
Hot rolling
Mechanical properties
Microalloying
Microstructure
Room temperature
Tensile stress
Thermal simulators
Thermomechanical treatment
Thick plates
Titanium
Vanadium
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Summary:High-strength low-alloy steels are known for their superior mechanical properties and these desired properties are achieved through controlled hot rolling. The cooling rate is one of the most important factors in controlled hot rolling, which plays a major role in the final microstructure and mechanical properties. In this work, the effect of the cooling rate on the final microstructure and mechanical properties of high Ti-V HSLA microalloyed steel was investigated using the Gleeble 1500™ thermomechanical processing simulator. The samples were cooled to room temperature after final pass deformation using two different cooling rates to simulate the 16 and 30 mm thick plate rolling patterns. Polygonal ferrite was found to be a dominant phase in the final microstructures; SEM-EBSD IPF maps also showed grains with random orientation distribution. Yield strength and ultimate tensile stress increased by approximately 14% and 10%, respectively, with increasing cooling rate.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/202338806006