Results 141 to 150 of about 450 (186)
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Strengthening Nb–V microalloyed steel
Materials Science and Technology, 1991AbstractA process for producing a low pearlite steel containing small amounts of niobium and vanadium is described. Controlling rolling followed by a short annealing treatment results in grain refinement, precipitation strengthening, and matrix recovery, and produces plate with improved strength at increased toughness levels.
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Niobium microalloying in rail steels
Materials Science and Technology, 2017Rail steels rely primarily for their properties on wear and rolling-contact-fatigue resistance. These properties, together with toughness, can be optimised by implementing thermo-mechanical processing during rail manufacturing, assisted by controlled additions of strong carbide-forming microalloying elements. Niobium can be used at low concentrations,
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Compositional evolution of microalloy carbonitrides in a Mo-bearing microalloyed steel
Scripta Materialia, 2013Molybdenum is known to affect microalloy precipitate evolution during processing in ferrite and austenite, but a unified explanation of the role of Mo in precipitate evolution is still lacking. Experiments and thermodynamic calculations indicate that Mo is incorporated into (Nb,Mo)(C,N) precipitates both in the hot-rolled condition and after reheating ...
Enloe, CM +5 more
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Cleavage fracture of microalloyed forging steels
Scripta Metallurgica et Materialia, 1995Microalloying in medium C forging steels together with new processes such as thermomechanical treatments or direct quenching from the finishing forging temperature are being used to avoid expensive heat treatments and to obtain required optimum mechanical properties directly after forging.
M.A. Linaza +3 more
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Microalloyed steels for high-strength forgings
La Metallurgia Italiana, 2010In the past thirty-five years, two families of microalloyed (MA) steels have been developed for high strength barand forging applications. The first family was introduced in 1974 and represented the medium carbon steelsto which were added small amounts of niobium or vanadium.
DeArdo, A. J., Garcia, C. I., Hua, M.
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Impact Properties of Microalloyed Steel
2000Impact properties of two grades of microalloyed steel (Re>500MPa), work hardened by static and dynamic uniaxial tension are presented. Properties are analysed by impact testing at very high impact loading rate (v=785m/s) and by fatigue testing at ultrasonic, very high frequency (20kHz).
Buršak, M. +3 more
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High-temperature plasticity of microalloyed steel
Steel in Translation, 2016The influence of continuous casting of steel on the high-temperature plasticity of microalloyed steel is investigated. The Gleeble-3800 system is used for the physical modeling of the steel’s hot plasticity. The temperature ranges of plasticity are determined in different conditions of slab cooling in the continuouscasting machine.
M. A. Matveev, N. G. Kolbasnikov
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Microalloyed High Carbon Wire Steels
2014Increased demands for weight reduction in a variety of structures and applications are stimulating the development of wire products with increased strength. Boron, Vanadium, and Niobium microalloying of high carbon wire steels will be discussed, in particular alloying effects on austenite decomposition and pearlite transformation kinetics.
Emmanuel De Moor +2 more
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Microstructural Control in Microalloyed Steels
1979High-strength low-alloy (HSLA) steels constitute a classic metallurgical development in which alloying additions and thermomechanical processing have been brought together effectively to attain desired combinations of engineering properties through microstructural control.
M Cohen, SS Hansen
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HOT DUCTILITY OF MICROALLOYED STEELS
La Metallurgia Italiana, 2008The loss in ductility experienced by microalloyed steels at temperatures generally ranging from 700 to 1100°C is a widely studied subject in steel research. The hot ductility behaviour of steels is usually measured through the reduction of area of the samples after hot tensile tests performed up to fracture.
VEDANI, MAURIZIO +3 more
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