Next Article in Journal
Quantitative and Qualitative Analysis of Hydrogen Accumulation in Hydrogen-Storage Materials Using Hydrogen Extraction in an Inert Atmosphere
Next Article in Special Issue
Effect of Microstructure on Post-Rolling Induction Treatment in a Low C Ti-Mo Microalloyed Steel
Previous Article in Journal
Additive Manufactured A357.0 Samples Using the Laser Powder Bed Fusion Technique: Shear and Tensile Performance
Previous Article in Special Issue
Local Characterization of Precipitation and Correlation with the Prior Austenitic Microstructure in Nb-Ti-Microalloyed Steel by SEM and AFM Methods
Article

The Integration of Process and Product Metallurgy in Niobium Bearing Steels

CBMM North America, Inc., Pittsburgh, PA 15205, USA
Metals 2018, 8(9), 671; https://doi.org/10.3390/met8090671
Received: 15 July 2018 / Revised: 12 August 2018 / Accepted: 14 August 2018 / Published: 28 August 2018
(This article belongs to the Special Issue Advances in Microalloyed Steels)
A review of the technological integration of both the process and physical metallurgical advancements of value-added niobium (Nb) microalloyed thermo-mechanical controlled process (TMCP) steels have evolved into the development of higher quality steels for more demanding end user requirements. The connection of process and physical metallurgy is evolving through the integration of research that is aimed at improving product quality. However, often the connection of the process metallurgical parameters is not reported, especially with industrial data. The importance of this innovative metallurgical connection is validated by the market demand for reduced fuel consumption, improved quality, and CO2 emissions in both the automotive and construction sectors. This situation has further increased the demand for new higher quality Nb-bearing steel grades. This integrative process/physical metallurgical (IP/PM) approach applies to both low and high strength steel grades in numerous applications. Often, the transition from laboratory melted and TMCP to the production scale is challenging. The methodology, process control, and key production steps that are required during the melting, ladle metallurgy, continuous casting, thermal, and hot rolling production conditions often vary significantly from the laboratory conditions. Understanding the reasons and corrective action for these variations is a critical product development success factor. These process metallurgy parameters for the industrial melting, casting, reheating, and hot rolling of Nb grades are connected and correlated to the resultant microstructures, physical metallurgy, and mechanical properties. These advanced high strength steels are microalloyed with Nb, V, Ti and/or other elements, which affect the austenite-ferrite transformation. Niobium enables the achievement of substantial grain refinement when the plate or sheet is rolled with the proper reheat, hot reduction, and thermal schedule. A recently developed key metallurgical transition is in progress applying this integrative approach with the use of MicroNiobium. A reduction of Mn and C levels with the complementary refinement of the microstructural grain size through MicroNiobium additions improves the robustness of the steel to better accommodate some process metallurgy variations. Applications are evolving in lower strength steels with Nb to achieve complementary grain refinement. View Full-Text
Keywords: continuous casting; energy absorption; mechanical metallurgy; niobium; reheat process; thermo-mechanical controlled processing continuous casting; energy absorption; mechanical metallurgy; niobium; reheat process; thermo-mechanical controlled processing
Show Figures

Figure 1

MDPI and ACS Style

Jansto, S.G. The Integration of Process and Product Metallurgy in Niobium Bearing Steels. Metals 2018, 8, 671. https://doi.org/10.3390/met8090671

AMA Style

Jansto SG. The Integration of Process and Product Metallurgy in Niobium Bearing Steels. Metals. 2018; 8(9):671. https://doi.org/10.3390/met8090671

Chicago/Turabian Style

Jansto, Steven G. 2018. "The Integration of Process and Product Metallurgy in Niobium Bearing Steels" Metals 8, no. 9: 671. https://doi.org/10.3390/met8090671

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop