"A New Cost Effective Metallurgical Design Strategy to Develop Optimized Strength & Ductility Properties in Structural Steels "

by "Douglas G. Stalheim, Ronaldo Barbosa, Jose Rodriguez-Ibabe, Marcelo Rebellato, David Jarreta "

Publisher - "DGS Metallurgical Solutions, Inc., Vancouver, WA USA & CBMM Technology Suisse SA, Geneva, Switzerland , Universidade Federal de Minas Gerais, Brazil. , Mechanical Engineering, Univ of Navarra, Ceit Research Institute, San Sebastian (Spain) & Tecnun Engin

Category - Engineering & IT

"Annually over 500 million tons worldwide of flat and long commodity grade structural steel products are produced for applications in the construction sector. Major costs to produce these commodity grade structural steels lies in alloys, energy and depending on region labor. Production costs for these commodity grades, which typically have low margins for profits, continue to rise worldwide driven by ferro alloy costs. Improved operational efficiencies (productivity, reduced energy consumption, improved melt to finished yields, reduced consumable consumption, etc.) can be realized along with lowered alloy costs with a proper understanding of a new metallurgical strategy to alloy design. These operational efficiencies along with cost savings can be accomplished with proper alloy design in conjunction with the mills processing capabilities to achieve the desired end metallurgy/mechanical properties. Requirements of strength and ductility for any given structural steel microstructure are obtained from three metallurgical mechanisms or “building blocks”: a) grain size refinement, b) solid solution and c) precipitation. Overall operation costs including alloy costs can be minimized if better engineering of these contributions can be realized. The correct use of these factors brings improved process/mechanical property stability. Use of practical metallurgical modeling tools along with mill data to determine process control capabilities can also assist in optimization of the metallurgical designs for cost effective structural steel production. "

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