Mining, ore preparation and ferro-niobium production at Mineração Catalão
International Symposium Niobium'81
Guimarães, Helvécio N
This paper briefly explains the different operating steps involving mining, ore preparation and standard ferroniobium production at Mineração Catalão de Goiás. (AU)
Technical Paper (PDF 226.77 KB)
Development of High Chromium Ferritic Steels Strengthened by Intermetallic Phases
The Charles Hatchett Award is important to identify new applications and markets for Niobium. Introduced over 40 years ago, The Charles Hatchett Award is a prestigious recognition that aims to identify new applications and markets for Niobium. The award is sponsored by CBMM | Niobium and recognizes the best published research on the science and technology of Niobium. The annual award brings together technical experts worldwide, and a panel of international experts selects the winning paper. The 2015 Charles Hatchett Award winners’ presentation introduces the worldwide energy demand and steam oxidation resistance and creep strength in stainless steels. The main research goal of this paper is to explore the development of high chromium ferritic steels strengthened by intermetallic phases and the role of niobium in thermomechanical treatment, microstructure and mechanical properties, in high-performance ferritic steels.
Guidance on making ferroniobium additions during ladle steelmaking
Niobium has an established niche in many types of steel products because of its unique ability to improve strength, toughness and weldability. About 15 percent of ferroniobium (FeNb) ends up in stainless steel production, which is an important growth sector, but the vast majority is currently consumed in the production of what we call high strength low alloy (HSLA) steels, often also referred to as microalloyed steels.
How much niobium can I use?
The amount of Niobium we can practically use during the hot rolling of steel products is mainly dependent on the carbon and nitrogen contents of the steel and the furnace reheating and drop-out temperature of the cast product prior to rolling.
Direct observation of niobium segregation to dislocations in steel
The Charles Hatchett Award is important to identify new applications and markets for Niobium. Introduced over 40 years ago, the Charles Hatchett Award is sponsored by CBMM Niobium and recognizes the best published research on the science and technology of Niobium. The annual award brings together technical experts from around the world and the winning paper is selected by a panel of international experts. The 2017 Charles Hatchett Award winners video presentation shows the acknowledgment of the various questions and uncertainties regarding the alloying elements during the direct observation of Niobium segregation to dislocations in steel. This paper aims to clarify these issues using atomic scale characterization and niobium as the alloying element in steel for grain refinement through the retardation of recrystallization in the hot rolling process and the cold rolling annealing process of the steel materials.
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