Microalloyed Steels
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Vida a fatiga de uniones soldadas mediante PAW de aceros microaleados al boro
ABSTRACT In the last years microalloyed boron steels have been adopted in the automotive industry to achieve weight reductions. Namely, they are used as load-bearing elements such as pillars and reinforcements, in a quenched and tempered (QT) condition with tensile strength ranging from 800 to 1300 MPa. Dual-Phase (DP) steels have also been introduced in thi
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Influence of Niobium and Molybdenum on Mechanical Strength and Wear Resistance of Microalloyed Steels
The HSLA (High-Strength Low Alloy) steels are used in the production of pipes, flanges and connectors to build ducts for ore, oil and gas transport. The conventional processes are the rolling or forging. In the transport of ore and heavy oil, the abrasive particles impair the surfaces and reduce the pipelines lifetime. Therefore, besides the mechanical prope
Mat. Res.. Publicado em: 05/06/2017
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3. The Analysis of the Microstructure and Mechanical Properties of Low Carbon Microalloyed Steels after Ultra Fast Cooling
In this paper, two low carbon microalloyed steels, named as steel A and steel B, were fabricated by ultra fast cooling (UFC). In both steels, the microstructures containing quasi polygonal ferrite (QF), acicular ferrite (AF) and granular bainite (GB) can be obtained by UFC process. The amount of AF in steel B is more than that in steel A. The size and distri
Mat. Res.. Publicado em: 18/05/2017
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4. Influence of Heat Input and Filler Metal on Mechanical Properties and Microstructure of Microalloyed High Strength Steel Welded by FCAW
AbstractCurrently, microalloyed high strength steels are being widely used to replace C and C-Mn steels for their advantages in terms of mechanical properties, corrosion resistance and weldability, allowing weight reduction of vehicles and structures without impairing their strength. When these steels are welded, the welding heat cycle causes microstructural
Soldag. insp.. Publicado em: 2015-06
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5. Estudo do comportamento termomecânico do aço API 5L X80 microligado ao Nb-Ti através de ensaios de torção a quente
AbstractThe controlled rolling of high strength low alloy steel has been widely used in the production of large diameter pipes for the oil and gas industry. The thermo-mechanical control process (TMCP) is used to maximize grain refinement and achieve both higher strength and toughness in the steels. In this sense, API 5L X80 micro-alloyed Nb-Ti steel was sub
Rem: Rev. Esc. Minas. Publicado em: 2015-06
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6. The Evolution of the Niobium Production in Brazil
Niobium (Nb) was initially applied in the industry in 1933 to stabilize stainless steels against intergranular corrosion. Around 1970, niobium started to be used in many technological applications, especially in heat treatments at high temperatures, in the form of superalloys and, over the past four decades, Nb has been employed on an industrial scale. Durin
Mat. Res.. Publicado em: 2015-02
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7. Application of ANFIS for modeling of microhardness of high strength low alloy (HSLA) steels in continuous cooling
The paper presents some results of the research connected with the development of new approach based on the Adaptive Network-based Fuzzy Inference Systems (ANFIS) of predicting the Vickers microhardness of the phase constituents occurring in five steel samples after continuous cooling. The independent variables in the model are chemical compositions, initial
Mat. Res.. Publicado em: 05/04/2013
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8. Adição de nanopartículas de Ti em matriz de Fe através da deposição por magnetron sputtering
Os aços microligados constituem uma classe específica de aço com baixos teores de carbono e elementos microligantes, como: vanádio (V), nióbio (Nb) e titânio (Ti). O desenvolvimento e aplicação dos aços microligados, e de aços em geral, estão limitados à manipulação dos pós com partículas de dimensões submicrométricas ou mesmo nanométricas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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9. Desenvolvimento do aço microligado para rodas ferroviárias / Development of microalloyed steel for railway wheels
In this work it was developed a microalloyed steel with 0.7% carbon to manufacture railway wheels. It was taken as basis a steel class C of standard AAR M-107 and added niobium and molybdenum. The research was conducted in two stages. The first step was studied the effect of the addition of niobium and molybdenum on 0.7% C steel before and after deformation
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2010
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10. Effect of thermo-mechanical parameters on microstructure and mechanical properties of microalloyed steels
In this work the effects of controlled rolling parameters and adding of Niobium have been studied. In this order two steel grades with and without Niobium are planed and after steelmaking and continuous casting, rolling process are done. Then, laboratory investigations such as microstructure, mechanical properties and grain size analysis were performed Tensi
Brazilian Journal of Physics. Publicado em: 2010-12
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11. Estudo da solubilização do Nb em aços microligados durante reaquecimento de placas
This study evaluate the reheating conditions effects on the dissolution of microalloyed steels, specially Nb and Ti, and the N influence in the dissolution of cabonitrides, nitrates and carbides. Samples of 3 industrially produced slabs of Nb-Ti-V microalloyed steel, which contain different amounts of N, due to the operational conditions, were evaluated. The
Publicado em: 2010
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12. Evaluation of the transformation mechanisms and mechanical properties of ferrite: martensite microalloyed steels
The influence of starting point microstructures on the transformation mechanisms and mechanical properties of a micro alloyed steel after annealing in the alpha + gamma region have been investigated. Three different microstructures: austenite, pearlite in a ferrite matrix and martensite were used as starting point microstructures for the production of dual (
Materials Research. Publicado em: 2008-03