Development of Low Carbon Microalloyed Ultra High Strength Steels

A. Ghosh; Brajendra Mishra; Subrata Chatterjee

doi:10.4028/www.scientific.net/MSF.500-501.551

Paper Titles

Application of Niobium in Quenched and Tempered High-Strength Steels
p.519

Influence of Composition and Processing Conditions on Mechanical Properties and Fish-Scale Resistance of Microalloyed Steels for Double-Face Vitreous Enamelling
p.527

Processing Low and Ultra-Low Carbon Bainitic Steels with Excellent Property Combinations
p.535

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

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

Development of Low Carbon Microalloyed Ultra High Strength Steels

Abstract:

In the present study HSLA steels of varying carbon concentrations, alloyed with Mn, Ni, Cr, Mo, Cu and micro-alloyed with Nb and Ti were subjected to different finish rolling temperatures from 850oC to 750oC in steps of 50oC. The microstructure of the steel predominantly shows martensite. Fine twins, strain induced precipitates in the martensite lath along with e-Cu precipitates are observed in the microstructure. With an increase in carbon content the strength value increases from 1200MPa UTS to 1700MPa UTS with a negligible reduction in elongation. Impact toughness values of 20-26 joules at room temperature and −40oC were obtained in sub-size samples.

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Periodical:

Materials Science Forum (Volumes 500-501)

Pages:

551-558

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.500-501.551

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Online since:

November 2005

Authors:

A. Ghosh, Brajendra Mishra, Subrata Chatterjee

Keywords:

FRT, HSLA Steels, Martensite, Thermo-Mechanical Control Process (TMCP)

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