Achieving High Tensile Properties in a C-Mn-Si Structural Steel by Simulating Hot Rolling and Heat Treatment Schedules

Balbir Singh; V. Kumar; S. Ghosal; B.K. Jha

doi:10.4028/www.scientific.net/MSF.762.89

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Physical Simulation of Thermomechanical Processing of Multiphase Mn-Al Steels with Retained Austenite
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Designing a Novel DQ&P Process through Physical Simulation Studies
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Achieving High Tensile Properties in a C-Mn-Si Structural Steel by Simulating Hot Rolling and Heat Treatment Schedules
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HomeMaterials Science ForumMaterials Science Forum Vol. 762Achieving High Tensile Properties in a C-Mn-Si...

Achieving High Tensile Properties in a C-Mn-Si Structural Steel by Simulating Hot Rolling and Heat Treatment Schedules

Abstract:

The C, Mn and Si impart high strength to steels through solid solution strengthening. On hardening and tempering, these elements further increase the strength substantially by exploiting hardenability potentials. With this point in view, a microalloyed C-Mn-Si steel was designed to have elements in the range of C:0.24-0.28, Mn:1.30-1.50, Si:1.30-1.50, Cr.0.10-0.20, Ni:0.20-0.40, Mo:0.15-0.25, P:0.015max, S:0.010max and H:2ppm max. Aiming at this range of chemistry, steel was made in an electric arc furnace, refined in VAD and continuous cast to 170mm x 1160 mm slabs. Prior to hot rolling of the slabs, hot deformation and dilatation studies were carried out in a Gleeble-3500C system for simulating hot rolling and heat treatment schedules. Employing the designed parameters, the slabs were hot rolled to 5 mm x 1135 mm x 4600 mm plates, which were subsequently hardened and tempered to obtain hardness levels >460 BHN, YS >1300 MPa, UTS >1500 MPa, elongation >8% and reduction in area >25% in the material. The plates contained >95% martensite in the microstructure and observed to have adequately smooth surfaces free from defects such as holes, roll marks, scabs and rolled-in scale, etc. Keywords: Hardening, Tempering, Quenching, Simulation, Strategic Application

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Periodical:

Materials Science Forum (Volume 762)

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89-94

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.762.89

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July 2013

Authors:

Balbir Singh, V. Kumar, S. Ghosal, B.K. Jha

Keywords:

Hardening, Quenching, Simulation, Strategic Application, Tempering

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