Interstitial Free Steel
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Caracterização Mecânica e Análise Microestrutural de Chapas Obtidas pelo Processo de Tailor Welded Blank (TWB)
Resumo Um dos maiores desafios da indústria automobilística, a nível global, trata-se de desenvolver veículos que sejam, simultaneamente, leves e resistentes mecanicamente. O Tailor Welded Blank (TWB) surge como solução, pois é um processo que permite a soldagem de topo de chapas de diferentes especificações (material, espessura e/ou revestimento),
Soldag. insp.. Publicado em: 14/11/2019
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2. The Effect of Heat Treatment on Dynamic Strain Aging Behaviour of AISI H10 Hot Work Tool Steel
Dynamic strain aging (DSA) behaviour of hot work tool steel (H10) was investigated under as- received (AR) and as-quenched (AQ) conditions. Hot tensile test was carried out in the temperatures of 25°C-700°C at a strain rate of 1x10-3s-1. The tensile properties indicated that AQ samples showed an increase in yield strength (YS) and ultimate tensile strength
Mat. Res.. Publicado em: 18/12/2017
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3. Mechanical Properties and Crystallographic Texture of Symmetrical and Asymmetrical Cold Rolled IF Steels
Abstract The crystallographic texture developed during cold rolling and subsequent annealing of interstitial free sheet steels aims to increase conformability. For this, it is necessary to obtain partial α-fiber and continuous and homogeneous γ-fiber texture components. In this work, the influence of symmetric (SR) and asymmetric (AR) cold rolling on cryst
Mat. Res.. Publicado em: 08/08/2016
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4. Evaluation of Residual Stresses and Mechanical Properties of IF Steel Welded Joints by Laser and Plasma Processes
Interstitial free (IF) steel has an extensive application in the automotive industry where the Laser Beam Welding (LBW) process is widely used due to its high productivity. Similarly, the other used process, Plasma Arc Welding (PAW), is characterized by a greater energy concentration and current density and therefore lower distortion, higher welding speeds a
Mat. Res.. Publicado em: 29/04/2016
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5. Uniaxial near plane strain tensile tests applied to the determination of the FLC0 formabillity parameter
An alternative procedure for the determination of the FLC0 value, the limit strain value corresponding to the plane strain mode of the Forming Limit Curves (FLC), a critical parameter in the sheet formability analysis, is suggested and compared with conventional Nakazima simulation tests. The procedure was tested using two different materials: interstitial-f
Mat. Res.. Publicado em: 13/06/2014
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6. Experimental analysis and theoretical predictions of the limit strains of a hot-dip galvanized interstitial-free steel sheet
In this work, the formability of a hot-dip galvanized interstitial-free (IF) steel sheet was evaluated by means of uniaxial tensile and Forming Limit Curve (FLC) tests. The FLC was defined using the flat-bottomed Marciniak's punch technique, where the strain analysis was made using a digital image correlation software. A plastic localization model was also p
Mat. Res.. Publicado em: 08/02/2013
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7. Otimização do corte de pontas de um aço livre de intersticiais laminado a quente usando tesoura do tipo guilhotina / Optimization the cut edge of a hot rolled interstitial free steel using a guillotine type shearing machine
The automotive industry\ s demand for high formability steels for use in exposed body panels motivated the development of several interstitial free (IF) steels specifications at Companhia Siderurgica Nacional. The \"IF-Ti\" steel specification belongs to the special deep drawing steels group (CSN EEP-IF), with yield strength <380 MPa, and among all grades of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
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8. Caracterização de fases intermetálicas presentes em aço galvanizado por imersão a quente com tratamento térmico do revestimento metálico
Hot dip galvanized steels with thermal treatment, or galvannealed steels, are used in automotive industries because of their properties of weldability, workability, and corrosion resistance. The hot dip galvanized steel with thermal treatment is called as galvannealed. The zinc layer of galvannealed steels have iron-zinc intermetallic phases, depending on th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2010
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9. Estudo sobre o pick-up de nitrogênio após a etapa de refino primário do aço
With the growing need of high quality steel there is a great demand for the development and production of steels with ever stringent chemical composition restrictions. For instance the presence of carbon and nitrogen in Interstitial Free steels for automobile industry. These restrictions are defined by the final application to which the product is destined.
Publicado em: 2010
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10. Aperfeiçoamento do corte lateral de aços livres de intersticiais laminados a quente / Improvement the side trimming of interstitial free steel hot rolled strip
Os aços livres de intersticiais (IF) têm sido usados em todo o mundo de um modo crescente desde a década de 70. A grande aplicação deste tipo de aço é na indústria automobilística em função de sua excelente conformabilidade, aliada à característica de não envelhecimento. Estas características facilitam a produção e permitem o desenvolvimento
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/07/2009
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11. Effect of Ti and Nb Additions on the Formation of Craters for IF Steel Galvanneal Coatings
Interstitial Free steels feature alloying elements present in an ultra low C matrix that account for C stabilization and consequently a high number of C free interstitials in a ferrite matrix that give these steels the ideal texture, low yield point, favorable plastic strain ratios, high elongation and n-value necessary for an ideal performance on forming pr
Publicado em: 2009
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12. Characterization of skin-pass mill over-rolling on a IF steel. / Caracterização de um aço IF após relaminação no laminador de encruamento.
The continuous search of the improvement of the competitiveness of the steel front to the succedanea has led to the development of special materials, allowing to take care of three of the main demands of the automotive sector: reduction of weight, fuel economy and increase of the safety of the user. The conditions under which the process of strain hardening
Publicado em: 2009