Niobium-Containing Steel Metallurgy, Product Segments and Applications

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Abstract: Over the past decade numerous metallurgical and technological enhancements have been developed within the niobium-containing steel bar, plate, sheet and long products sector. These developments not only encompass traditional low carbon steels but now transcend into medium and high carbon steels. Different niobium-containing product designs incorporate mechanisms such as precipitation behavior, grain refinement, recrystallization and achievement of the desired microstructure. Specific applications illustrate the metallurgical global objective toward a more homogeneous grain size through the cross section of a given product. Improved steel robustness contributes to reduced internal and external quality problems during steel production. More robust steel is the end-user driver across the automotive, energy and structural global segments. The steel application robustness may be measured in terms of stretch flangeability, toughness, fatigue, fracture toughness, yield-to-tensile ratio consistency, stress-strain behavior under low and high strain rates and overall ductility at given operating service temperatures dependent upon end user requirements.

Authors: Steven G. Jansto

Keywords: Energy absorption, Grain refinement, Manganese, Niobium

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Page Count

9 pages

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