نتایج جستجو برای: microalloyed steel
تعداد نتایج: 81506 فیلتر نتایج به سال:
The problem of Scheduling Hot Rolling Pass of Steels is very complex because it has large spaces search for solutions. The aim of this work was the Multi-Objective Optimization (MOO) of hot rolling steel sheets in a finishing train of six steps, implementing the second generation of Nondominated Sorting Genetic Algorithm (NSGA-II). It was used two different crossover (AG1 y AG2) operators and t...
This study reports the welded joint of a novel 590 MPa V-N microalloyed wheel steel on microstructure and mechanical properties after flash butt welding. The welding parameters were current 48°/582.0 A, upsetting 44°/516.6 workpiece clearance 1.5 mm. evolution in occurred as follows: seam (ferrite side plate + acicular ferrite +martensite)→coarse-grained zone (acicular granular bainite)→fine-gr...
Abstract Based on the thermodynamic coupling model of multiple microelements in steels, solid solution and precipitation behavior Nb-V-N-C system quaternary secondary phase was further verified microalloyed combining with engineering practice high-strength spring steel FAS3550 containing nanoparticles. According to calculations, dissolved V (or Nb) content increased increasing addition Nb), whi...
The effect of grain size on the mechanical properties and creep rupture 253 microalloyed (MA) austenitic stainless steel (ASS) was investigated. cold rolling process with a 53% reduction in thickness applied to followed by annealing at 1100 °C over 0, 900, 1800, 3600 s obtain sizes 32.4, 34.88, 40.35, 43.77 µm, respectively. Uniaxial tensile micro-Vickers hardness tests were carried out study r...
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