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Добірка наукової літератури з теми "Grain-Oriented electrical steels"

Автор: Grafiati
Опубліковано: 13 січня 2023

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Статті в журналах з теми "Grain-Oriented electrical steels"

1

Mohd Ali, B. B., and A. J. Moses. "A grain detection system for grain-oriented electrical steels." IEEE Transactions on Magnetics 25, no. 6 (1989): 4421–26. http://dx.doi.org/10.1109/20.45322.

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2

Wiglasz, Vladislav. "Power losses in grain-oriented electrical steels." Journal of Magnetism and Magnetic Materials 112, no. 1-3 (July 1992): 33–35. http://dx.doi.org/10.1016/0304-8853(92)91104-2.

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3

Kefalas, Themistoklis D., Zachos K. Papazacharopoulos, and Antonios Kladas. "Experimental and Theoretical Analysis of Iron Losses of Electrical Steels Subjected to Distorted Supply Voltage Waveform Conditions." Materials Science Forum 721 (June 2012): 171–76. http://dx.doi.org/10.4028/www.scientific.net/msf.721.171.

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Анотація:
Iron losses of grain-oriented electrical steels, is sensitive to the distortion of the supply voltage waveform of the excitation winding. As a result, magnetic cores of electrical machines and transformers manufactured of grain-oriented electrical steels present significant increase of iron losses when working under distorted supply voltage waveform. In the present paper, an experimental apparatus is developed in order to evaluate the effect of distorted supply voltage waveform on iron losses of grain-oriented electrical steels. Also, a theoretical analysis based on the hysteresis design tool of Matlab and the finite element method considering hysteresis is carried out.
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4

Kovác̆, F., M. Dz̆ubinský, and Y. Sidor. "Columnar grain growth in non-oriented electrical steels." Journal of Magnetism and Magnetic Materials 269, no. 3 (March 2004): 333–40. http://dx.doi.org/10.1016/s0304-8853(03)00628-0.

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5

Bürger, R., H. Kleine, S. Mager, and J. Wieting. "New possibilities for semifinished grain-oriented and non-oriented electrical steels." Journal of Magnetism and Magnetic Materials 112, no. 1-3 (July 1992): 212–14. http://dx.doi.org/10.1016/0304-8853(92)91155-m.

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6

Arita, Y., and Yoshiyuki Ushigami. "Effect of Aluminum and Titanium Content on Grain Growth, Texture and Magnetic Properties in 3%Si Non-Oriented Electrical Steel." Materials Science Forum 539-543 (March 2007): 4428–33. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.4428.

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The effect of annealing temperature on grain growth, texture development and magnetic properties of Al-free and Al-1% added non-oriented electrical steel were investigated. Normal grain growth occurred in Al-free steel. On the other hand, abnormal grain growth occurred in Al-added steel which was annealed at 800°C for 24h. Precipitates in these two steels were different. TiN precipitated in Alfree steel, but in the case of Al-added steel, AlN and TiC precipitated. The TiC in Al-added steel was so fine that it inhibited the normal grain growth and finally caused the abnormal grain growth. Main textures of both steels were near {111}<112>, but the intensity of near {111}<112> in the abnormal grain growth was higher than that in the normal grain growth. Magnetic flux density (B50/Bs) was decreased by the grain growth. Especially B50/Bs in the abnormal grain growth was lower than that in normal grain growth. B50/Bs in these steels can be estimated by their three-dimensional textures in vector method.
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Price, K., B. Goode, and D. Power. "Grain-oriented electrical steels for power and distribution transformers." Ironmaking & Steelmaking 43, no. 9 (September 26, 2016): 636–41. http://dx.doi.org/10.1080/03019233.2016.1211122.

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8

Kovac, F., V. Stoyka, and I. Petryshynets. "Strain-induced grain growth in non-oriented electrical steels." Journal of Magnetism and Magnetic Materials 320, no. 20 (October 2008): e627-e630. http://dx.doi.org/10.1016/j.jmmm.2008.04.020.

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9

Stewart, Zackary, and K. V. Sudhakar. "Efficient Batch Anneal for Non-Grain Oriented Electrical Steels." Journal of Mechatronics 3, no. 3 (September 1, 2015): 225–28. http://dx.doi.org/10.1166/jom.2015.1126.

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10

He, Qinyu, Yulong Liu, Chengyi Zhu, Xiaohui Xie, Rong Zhu, and Guangqiang Li. "Effect of Phosphorus Content on Magnetic and Mechanical Properties of Non-Oriented Electrical Steel." Materials 15, no. 18 (September 13, 2022): 6332. http://dx.doi.org/10.3390/ma15186332.

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Анотація:
The effect of target phosphorus (P) content on the precipitates, microstructure, texture, magnetic properties, and mechanical properties of low-carbon (C) and low-silicon (Si) non-oriented electrical steel (NOES) was investigated and the influence mechanism was clarified. The results indicate that the precipitates in the steels are mainly aluminum (Al)-manganese (Mn)-Si-bearing complex nitrides ((Al,Si,Mn)xNy) and P-bearing complex nitrides ((Al,Si,Mn)xNy-P). Increasing target phosphorus content in the steels decreases (Al,Si,Mn)xNy, and increases (Al,Si,Mn)xNy-P. The number density of the precipitates is the lowest, and the average size of the precipitates and grain size of the finished steel is the largest in the samples with target P content at the 0.14% level (0.14%P-targeted). The average grain size and microstructure homogeneity of the steels are influenced by the addition of phosphorus. The content of the {111}<112> component decreases, and the favorable texture increases after phosphorus is added to the steel. The magnetic induction of the steel is improved. Grain refinement and microstructure inhomogeneity lead to an iron loss increase after target phosphorus content increases in the steel. The best magnetic induction B50 is 1.765 T in the 0.14%P-targeted samples. The tensile strength and yield strength are improved owing to solid solution strengthening and the grain refinement effect of phosphorus added to the steels.
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Більше джерел

Дисертації з теми "Grain-Oriented electrical steels"

1

Xu, Xintong. "Localised variation of magnetic properties of grain-oriented electrical steels." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/75654/.

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Localised magnetic flux density, magnetising field and power loss are believed to distribute non-uniformly in grain oriented electrical steel. Understanding of the causes of their variation can help reduce the overall power loss of the material. In this investigation, magnetic domain observation was often used in the study of domain configuration and crystal orientation of the test specimens. Methods of domain observation have been studied and compared in order to select the appropriate method for different parts of the investigation and to improve the understanding of the image observed. A less destructive local loss measurement sensor has been built for the measurement of localised flux density, magnetising field and power loss. The sensor was tested and evaluated specifically for the measurement of localised magnetic power loss of the high permeability grain oriented electrical steel. The results obtained from local loss scanning measurements indicated that localised flux density and magnetising field can vary substantially in grain oriented electrical steel under AC magnetisation of 50 Hz. The variation of localised flux density has been found mainly resulted by grain misorientation and local grain arrangement. The transverse component of flux density was detected and has been found increases with increasing grain misorientation. The variation of localised magnetising field has been found mainly influenced by the localised demagnetising field due to formation of free magnetic poles at grain boundaries. It has been proved that both flux density and magnetising field have strong influence on the distribution of localised power loss. The study of the effect of domain refinement on distribution of localised flux density showed that domain refinement by means of ball scribing on one surface of grain oriented electrical steel can improve the uniformity of distribution of flux density. However, results also inferred that excessive scribing in a confined area can cause obvious uneven distribution of flux density in the direction of the specimen’s thickness.
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Millan, Mirabal Leysmir Adriana. "Contribution à la caractérisation et à la modélisation 3D de l'anisotropie des aciers électriques à grains orientés en vue du calcul des pertes aux extrémités des turbo-alternateurs." Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILN013.

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Анотація:
Récemment, les gestionnaires de réseau et de système de transmission, comme le Réseau européen des gestionnaires de réseau de transport d'électricité (ENTSO-E), mettent en place des réglementations pour étendre la plage de fonctionnement des équipements connectés au réseau électrique. Les principaux objectifs de ces modifications sont : d'augmenter la flexibilité du réseau en le rendant capable de supporter des variations de fréquence et de tension (dues aux modifications de l'équilibre des puissances active et réactive) et de faciliter l'intégration et la production d'énergie renouvelable. Cependant, de nombreux équipements installés et raccordés au réseau n'ont pas été conçus pour être exploités dans ces plages de fonctionnement et leur utilisation dans ces conditions peut avoir un impact négatif sur le cycle de vie des équipements, en particulier dans les turbo-alternateurs.Les grands turbo-alternateurs, utilisés pour la production d'électricité dans les centrales nucléaires et hydroélectriques, sont impactés par ces nouvelles réglementations. Cet impact est particulièrement observé aux extrémités de ces machines électriques où les pertes fer sont susceptibles d'augmenter significativement. Ces pertes peuvent entraîner des échauffements, notamment des points chauds, qui peuvent conduire à la fusion de l’isolation entre les tôles du noyau du stator, provoquant ainsi des courts-circuits et des dommages irréversibles à l'équipement. Afin de pouvoir analyser et limiter l'impact des mécanismes physiques mis en jeu, la société EDF s’appuie sur des simulations numériques tridimensionnelles de la machine électrique pour calculer les pertes pour différents régimes de fonctionnement.Une partie de ce travail a déjà été réalisée au laboratoire L2EP, où le logiciel d'analyse par éléments finis code_Carmel a été adapté pour le calcul des pertes dans le noyau du stator et des pertes joule dans les modèles tridimensionnels. Cependant, la complexité physique des propriétés des circuits magnétiques aux extrémités des turbo-alternateurs doit être prise en compte pour obtenir des résultats fiables. En effet, compte tenu du schéma tridimensionnel du chemin du flux magnétique et des propriétés fortement anisotropes du circuit magnétique en acier électrique à grains orientés (GO), la description des pertes fer nécessite des modèles de matériaux magnétiques anisotropes précis combinés à une modélisation numérique efficace.Dans le cadre de ce travail de thèse, des modèles anisotropes dédiés aux aciers GO, notamment pour décrire la loi de comportement et les pertes fer, ont été étudiés puis implémentés dans un environnement de simulation par éléments finis (FEM) au sein du logiciel code_Carmel. La mise en œuvre a été validée par rapport à des données expérimentales obtenues sur un acier GO de qualité industrielle conventionnelle généralement utilisée dans les turbo-alternateurs. De plus, un démonstrateur expérimental a été développé pour étudier plus finement le comportement magnétique d'un empilement de tôles GO soumis à des excitations de flux magnétique 3D non conventionnelles. Un modèle numérique du démonstrateur expérimental a été développé et étudié, incluant les modèles de matériaux anisotropes, en comparant le comportement global du matériau GO ainsi que les pertes de fer dans l'échantillon d'intérêt.Les résultats montrent que, dans des configurations d'attaque de flux magnétique non conventionnelles, en particulier avec une attaque de flux magnétique normale au plan de laminage, les caractéristiques anisotropes de l’acier GO peuvent influencer la distribution du flux magnétique dans l'empilement de tôles étudié ainsi que les pertes de fer associées. Notamment, et comme attendu, les pertes par courants de Foucault classiques constituent la contribution majeure aux pertes fer dans l’empilement de tôles étudiées
Recently, network and transmission system operators like the European Network of Transmission System Operators of Electricity (ENTSO-E) have started to create regulations to extend the range of operation of the equipment connected to the electrical grid. The main purposes of these changes are: to increase the flexibility of the grid by making it able to withstand variations of frequency and voltage (due to alterations in the active and reactive power balance), and to ease the integration of renewable energy generation. However, many of the installed equipment connected to the grid have not been conceived to be exploited in these operating ranges and their use under these conditions will have a negative impact, especially on the turbo-generators life cycle.Large turbo-generators, used for the generation of electricity in nuclear and hydroelectric power plants, are affected by these new regulations. This impact is especially evident at end-regions of these electrical machines, where the iron losses are likely to increase significantly. These losses can lead to overheating, in particular hot points which can lead to the melting of the insulation layers between the lamination of the stator core, causing short-circuits and irreversible damage to the equipment. To be able to analyze and limit the impact of the involved physical mechanisms, the EDF Company works with tridimensional numerical simulations of the electrical machine to calculate the losses under different regimes of operation.Part of this work has already been realized in the L2EP laboratory, where the finite element analysis software code_Carmel have been adapted for the calculation of core losses and joule losses in tridimensional models. However, the physical complexity of the magnetic circuit properties at the end-regions of turbo-generators must be accounted for, in order to have reliable results. Indeed, considering the tridimensional pattern of the magnetic flux path and the strongly anisotropic properties of the magnetic circuit made from grain oriented electrical steel (GOES), the description of the iron losses requires accurate anisotropic magnetic material models combined with an efficient numerical modelling.In the framework of this PhD work, anisotropic GOES models, related to the behavior law and iron losses, have been studied and successfully implemented in a finite element method (FEM) simulation environment within the software code_Carmel. The implementation has been validated against experimental data achieved on an industrial conventional GO grade typically used in turbogenerators. Also, an experimental demonstrator has been developed to investigate more closely the magnetic behavior of a lamination stack made of GOES under non-conventional 3D magnetic flux excitations. A numerical model of the experimental demonstrator has been developed and studied with the implemented material models by comparing the global behavior of GOES as well as the iron losses in the sample of interest.The results show that under non-conventional magnetic flux attack configurations, especially with a magnetic flux attack normal to the lamination plane, the anisotropic characteristics of the GOES can influence the magnetic flux distribution within the lamination stack and the associated iron losses. In particular, the classical eddy current losses constitute, as expected, the most significant contribution of the total iron losses in the GOES laminations
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Hoshtanar, Oleksandr. "Dynamic domain observation in grain-oriented electrical steel using magneto-optical techniques." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/55166/.

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Direct, real time domain observations in electrical steel during its magnetisation at 50 Hz and 75 Hz was limited due to low the limited sensitivity and frame sampling rate of the camera systems available. In this work, a high efficiency Kerr magneto-optic microscope was coupled to a recent commercially available high speed intensified camera. The superior efficiency of the developed system enabled domain dynamics measurement to be made at magnetisation frequencies up to 100 Hz in the real time mode and up to 1.8 kHz in stroboscopic mode. The application of the system was focussed on the study of grain-oriented electrical steel. Observations in this work revealed that the behaviour of the domain walls under sinusoidal excitation is far from being ideal sinusoidal motion. The deviations from the ideal behaviour can be summarised as non-sinusoidal, non uniform and non-repetitive domain wall motion. The dependence of the non- uniformity of wall motion and cycle-to-cycle non-repeatability on magnetisation conditions studied by direct real-time observation revealed that under certain conditions the non-uniformity and non-repeatability is much higher. Recommendations have been made on how to reduce losses by adjusting the magnetisation conditions and "magnetic history" of the steel core. The observations confirmed previous researchers' suggestions that the perfection of grain-to-grain orientation and grain size uniformity would improve wall motion uniformity, hence reducing power loss in the material. In addition to Kerr-microscopy observations, the application of a magnetic indicator imaging technique was demonstrated. Moving domains under the insulating, opaque coating on commercial grain-oriented electrical steel were observed using this method. The influence of surface roughness and the effect of coating tension on the domain structure and distortion of bar domains under dynamic magnetisation was observed. New experimental techniques and image processing programs have been developed such as the first attempt of automatic domain wall recognition and analysis by computer vision methods. It was demonstrated that the system and software tools were flexible for use with other materials such as steel, NiFe and CoFe alloys, amorphous ribbons and wires, ferrites and magnetic films.
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Poultney, Darren. "Measurement techniques for the analysis of surface layers on grain oriented electrical steel." Thesis, Swansea University, 2007. https://cronfa.swan.ac.uk/Record/cronfa42469.

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Fully processed, grain oriented electrical steel possesses a forsterite glass film and a phosphate-based insulation coating on both of its surfaces. The composition, quality and thickness of these layers, in addition to a preceding decarburisation oxide layer, are known to have a significant effect on the properties of the material on which the final product is assessed. This includes physical properties, such as appearance, as well as the magnetic properties upon which the electrical steel is routinely graded. Due to their importance, methods of rapidly and accurately assessing these surface layers would provide great benefits as the characteristics could be monitored to ensure the optimum processing conditions are achieved. Unfortunately, it has previously been found that the complexity of the layers has made their analysis problematical, particularly in terms of accuracy and the time required for testing. A number of experimental techniques have been investigated to establish their potential for the analysis of the aforementioned surface layers, including Fourier Transform Infrared (FTIR), Electrochemical Potential (ECP), X-ray Photoelectron Spectroscopy (XPS) and Sputtered Neutral Mass Spectrometry (SNMS). Further methods were also used to determine characteristics of the coated material such as magnetostriction and magnetic loss, which provided an insight into the stressing capability of the material. As a result of these investigations: Combining a number of techniques resulted in a correlation between ECP profiles and the composition and / or morphology of the decarburisation oxide layer. A link has been established between the transmittance levels of the FTIR spectra and the thickness of the forsterite glass film layer. FTIR absorption bands have been linked to the constituents of the insulation coating. Further to the study into the feasibility of these methods, a number of the techniques were used to analyse material during the development of an alternative, chrome-free insulation coating, which has subsequently been adopted as the standard production coating for the grain oriented electrical steel produced at Orb Works.
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5

Ramanathan, Sreevathsan. "Study of dislocations from continuous flattening anneal and its effect on magnetic properties of grain oriented electrical steel." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/56703/.

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Deformation mechanism and dislocation dynamics in grain oriented electrical steel (GOES) is not well established during the continuous flattening anneal process. This work deals with the study of deformation mechanisms during the process and the effect of lattice defects created during the process on the final magnetic properties of GOES. A heat transfer model of the continuous flattening anneal furnace was developed to calculate the temperature profile of the strip throughout the process. The heat transfer model showed the stability of peak strip temperature at 850oC when the line speed was varied from 60-90m/min. A deformation mechanism map was constructed for two varieties of GOES. The main implication of this model is the knowledge of the effect of process parameters like stress, temperature and strain rate on the formation of dislocation structure in GOES during continuous flattening anneal process. LAFFAS (Lab Annealing Furnace for Flattening Anneal Simulation) was constructed to simulate the continuous flattening anneal process and produce samples for dislocation study and magnetic testing. The high temperature mechanical behaviour of Conventional Grain Oriented+ ® (CGO+ - new GOES product) and its effect on magnetic properties were also analysed. Polygonization in GOES and the factors affecting polygonization were studied in detail. Initial orientation of the grains was determined to be a rate controlling factor for degree of polygonization along with temperature and annealing time. The degree of polygonization was shown to be an important parameter affecting the change in domain width. A localised decrease in specific total loss was observed at 1.5T and 50Hz in grains where polygonization was complete. An increase in specific total loss of about 10-35% at 1.5T and 50Hz in bulk polycrystalline material was observed due to the sensitivity of polygonization to initial texture resulting in incomplete polygonization in a high percentage of grains.
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6

Penin, Rémi. "Evaluation à priori des performances environnementales d'un noyau magnétique de transformateur triphasé sur la base de tests simplifiés." Thesis, Artois, 2014. http://www.theses.fr/2014ARTO0209/document.

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Анотація:
Le transformateur est aujourd’hui l’un des convertisseurs statiques les plus utilisé notamment dans la distribution électrique. Les tôles magnétiques servant à la construction de leurs circuits magnétiques sont devenues de plus en plus performantes permettant une réduction des pertes produites. Néanmoins, les tests normalisés permettant de caractériser les tôles magnétiques ne reflètent pas totalement le comportement énergétique du transformateur. De plus, une autre problématique a gagné en importance durant ces dernières années : le bruit acoustique émis. Malheureusement, il n’y pas encore de lien entre la qualité de la tôle à grains orientés choisie pour construire le circuit magnétique et le bruit acoustiques que va produire celui-ci. L’objectif de cette thèse est de répondre à cette double problématique à partir de tests simplifiés. En effet, de nombreux dispositifs expérimentaux et méthodologies ont été développés tels que la méthode des trois cadres, permettant d’étudier la répartition des pertes fer dans le transformateur, les circuits magnétiques décalés, permettant d’étudier les phénomènes à l’origine des bruit acoustique, et des modèles de transformateurs monophasés et triphasés. De plus, des simulations numériques ont été effectuées afin d’approfondir nos analyses des résultats expérimentaux. L’étude des dispositifs ont permis de mettre en évidence trois paramètres relatifs à la qualité des tôles magnétiques, entrainant des différences de répartition d’induction set donc des différences de répartition de pertes fer, d’une part, et de bruit acoustique dans les transformateurs, d’autre part
The transformer is now a static converter most notably used in electrical distribution. The electrical steel sheet used in the construction of their magnetic circuits have become more efficient to reduce losses occurred. However, standardized tests to characterize the electromagnetic steel do not fully reflect the energy behavior of the transformer. In addition, another issue has gained importance in recent years: the acoustic noise. Unfortunately, there is no link between the quality of grain oriented steel selected to construct the magnetic circuit and acoustic noise that will produce it. The objective of this thesis is to answer this dual problem from simplified test. Indeed, many experimental devices and methodologies have been developed such as the method of three frames, to study the distribution of core losses in the transformer, the magnetic circuits shifted, to study phenomena at the origin of acoustic noise, and models of single and three phase transformers. In addition, numerical simulations were performed to deepen our analysis of the experimental results. The study of the devices have allowed to identify three parameters relating to the quality of grain oriented electrical steel, resulting from differences in the distribution of the flux density and therefore, first, the differences in distribution of core loss and, hand, acoustic noise in transformers
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Cozonac, Dorin. "Conception d'une machine asynchrone haute température." Thesis, Artois, 2015. http://www.theses.fr/2015ARTO0209/document.

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Анотація:
Les bobinages des machines électriques tournantes actuelles sont, pour la plupart, isolés avec des matériaux issus de la chimie organique. La limite en température des bobinages actuels se situe au-dessous de 240°C. L’augmentation significative de la température de fonctionnement d’une machine permettrait d’envisager, indirectement, une augmentation de la densité de courant dans les conducteurs actifs. Dans ces conditions, ces nouvelles machines peuvent présenter une puissance, tant massique que volumétrique, supérieures à celles exploitées actuellement. De plus, les matériaux magnétiques permettent vraisemblablement de fonctionner jusqu’à 800°C. La limite technologique actuelle pour les machines est clairement l’isolant des conducteurs électriques. Ce sujet de thèse propose de définir une approche théorique couplée à des validations expérimentales pour définir les matériaux les mieux adaptés aux machines hautes températures en termes de mise en œuvre et de performances électriques. La conception, repensée autour du bobinage, sera concrétisée par le calcul d’une machine asynchrone à haute température (400°C au cœur du bobinage). Le bobinage devra être placé au cœur de la démarche de conception des machines en adaptant les formes et les propriétés des circuits magnétiques aux caractéristiques des nouvelles bobines
The windings that are currently used in electrical machines are mostly insulated based on organic insulation. The temperature limit of these windings is up to 240°C. Increasing the working temperature of electrical motors means, indirectly the increasing of current density on the main conductors. Therefore these new motors may provide a higher mass and volume power as classical machines. Furthermore, the magnetic materials can work up to 800 °C. Indeed, in reality technical limit today is the wire insulation. The objective of thesis is to define a theoretical approach combined with experimental validations for identify the appropriate electrical materials used on high-temperature electrical machines. Design is fixed around the winding, that will implemented by calculating a high-temperature asynchronous machine (400°C of windings). The windings are placed as the base of machine design and will determine the geometrical shape and properties of magnetic core
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Wen-Jie, Wang, and 王文杰. "Study on The Solubility Product of Inclusions of the Grain Oriented Electrical Steels." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/86905294660142187531.

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Анотація:
碩士
國立雲林科技大學
機械工程技術研究所
87
Grain oriented electrical steel is an important core material of transformers. Its magnetic properties significantly affect the energy efficiency of electrical apparatus. Inclusions are used as inhibitors to impede the normal grain growth of grain oriented electrical steel during the primary recrystallization. But, abnormal grain growth occurs to develop the preferred Goss texture during secondary recrystallization. Secondary recrystallization behaviors are influenced by its inclusion inhibitors. In this study, we systematically investigate the effect of reheating temperature and time on the size and distribution of inclusions of four extra low carbon silicon steels with various sulfur, maganese and aluminum contents. The experimental results from chemical analysis could be fitted with a singleline represented by an equation applicable to MnS. Log[Mn(wt%)*S(wt%)]=-2683/T-0.8197 where T is in kelvins. As same as, the solubility products of aluminum nitride could be fitted with a single line represented by an equation. Log[Al(wt%)*N(wt%)]=-4809/T-1.4165 The solubility products of inclusion increase with the get long time. Inclusion sizes are decreased with elevate reheating temperature. At high temperature, activation energy of inclusion elevates the diffusion coefficient , So, the dissolved rate increase with the elevated reheating temperature. As the time of inclusion dissolved increase, any size inclusion is decrease with time keep reheating temperature. In compnnent of inclusion, the count and distribution of inclusion is elevated by increased sulfur and aluminium contents.
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9

Ruan, Cheng-Hao, and 阮呈皓. "Effect of coating on the secondary recrystallization behaviors of grain oriented electrical steels." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/28675399865815750580.

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碩士
雲林科技大學
機械工程系碩士班
98
Grain oriented electrical steel is used to make transformer core. Its magnetic properties affect the energy efficiency of electrical machines. The size and volume of precipitates inhibit the primary grain growth and develop favorite Goss texture during secondary recrystallization. This study investigated the effect of MgO coating on the secondary recrystallization behaviors of grain oriented electrical steels by acquired inhibitor process. It is found that abnormal grain growth didn’t occur in the steels with aluminum less than 0.013 wt% due to insufficient precipitate amounts. On the other hand, abnormal grain growth occurred in the steels with aluminum higher than 0.035 wt%. Coated specimens had less deviation degree from Goss texture and better magnetic properties. The reason was insulator layer can prevent the dissociation of precipitates in the specimen and let abnormal grain growth developed completely. After secondary recrystallization, impurities such as nitrogen, sulfur and manganese diffused to the glassy layer and improve the magnetic properties. The phase formed in the insulator layer was Mg2Al4Si5O18 in the specimens decarburized below 700oC due to less SiO2. Dense Mg2SiO4 layer formed in the specimens decarburized higher than 750oC due to more SiO2 layer. Na2B4O7 is a catalyst to decrease the glassy forming temperature of Mg2SiO4. Therefore, add Na2B4O7 into MgO powder film can get dense glassy phase and good abnormal grain growth in the steels. TiO2 can improve the glassy film more dense.
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10

Lin, Hong-yu, and 林弘育. "Effects of Cu content on the Secondary Recrystallication Behaviors of Grain Oriented Electrical Steels." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/26474632200412400542.

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Анотація:
碩士
國立雲林科技大學
機械工程系碩士班
97
Grain oriented electrical steel is an important function magnetic material. It has excellent permeability during magnetization.Grain oriented electrical steel is usually used to make the transformer cores. The normal grain growth during primary annealing and let the preferred Goss grain grow during secondary recrystallization.The purpose was studied the effects of copper content at different hot band annealing temperature and cold rolling thickness of slab on the secondary recrystallization. Copper impeded the normal grain growth during primary annealing and let the preferred Goss grain grow during secondary recrystallization. Hot-rolling were not recrystallization in slab reheating at 1200℃. Hot rolling aneealing the grain size increases with increasing temperature. Carbon content will affect the content of nitrogen , however , the content of nitrogen will also affect the formation of precipitates. The highest induction(B8) was obtained when the nitrogen content in the steel sheet was 400ppm. After nitride treatment﹐the precipitates of CuS2、Si3N4 and AlN、MnS of the substrate, these precipitates will inhibit grain growth. Stable secondary recrystallization and the best magnetic properties are obtained for the specimens in hot band annealing at 1150℃.
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Книги з теми "Grain-Oriented electrical steels"

1

United States International Trade Commission. Grain-oriented silicon electrical steel from Italy. Washington, DC: U.S. International Trade Commission, 1994.

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United States International Trade Commission. Grain-oriented silicon electrical steel from Italy. Washington, DC: U.S. International Trade Commission, 1994.

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Commission, United States International Trade. Grain-oriented silicon electrical steel from Italy. Washington, DC: U.S. International Trade Commission, 1994.

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United States International Trade Commission. Grain-oriented silicon electrical steel from Italy. Washington, DC: U.S. International Trade Commission, 1994.

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Commission, United States International Trade. Grain-oriented silicon electrical steel from Italy. Washington, DC: U.S. International Trade Commission, 1994.

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Commission, United States International Trade. Grain-oriented silicon electrical steel from Italy and Japan. Washington, DC: U.S. International Trade Commission, 1994.

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United States International Trade Commission. Grain-oriented silicon electrical steel from Italy and Japan. Washington, DC: U.S. International Trade Commission, 1993.

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United States International Trade Commission. Grain-oriented silicon electrical steel from Italy and Japan. Washington, DC: U.S. International Trade Commission, 1993.

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United States International Trade Commission. Grain-oriented silicon electrical steel from Italy and Japan. Washington, DC: U.S. International Trade Commission, 1993.

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United States International Trade Commission. Grain-oriented silicon electrical steel from Italy and Japan. Washington, DC: U.S. International Trade Commission, 1994.

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Частини книг з теми "Grain-Oriented electrical steels"

1

Frommert, M., C. Zobrist, D. Raabe, S. Zaefferer, L. Lahn, and A. Böttcher. "Measurement of the Texture Sharpness in Grain-Oriented Electrical Steels." In Ceramic Transactions Series, 143–50. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470444191.ch16.

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2

Huneus, Hans, Klaus Günther, Philippe Martin, Brigitte Hammer, Wilhelm Schmitz, and Dieter Senk. "Thin Strip Casting as an Innovative Production Process for Grain Oriented Electrical Steel Sheet." In Steels and Materials for Power Plants, 33–38. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606181.ch6.

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3

Liao, Chun-Chih, and Chun-Kan Hou. "Effect of Tin on the Recrystallization Behavior and Texture of Grain Oriented Electrical Steels." In Ceramic Transactions Series, 231–42. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470444191.ch25.

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4

Ko, Kyung-Jun, Jong-Tae Park, and Chan-Hee Han. "Effect of Temper Rolling Reduction Prior to Hot Band Annealing on the Goss Texture Formation in Grain-Oriented Electrical Steels." In Proceedings of the 6th International Conference on Recrystallization and Grain Growth (ReX&GG 2016), 191–96. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48770-0_28.

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Ko, Kyung-Jun, Jong-Tae Park, and Chan-Hee Han. "Effect of Temper Rolling Reduction Prior to Hot Band Annealing on the Goss Texture Formation in Grain-Oriented Electrical Steels." In Proceedings of the 6th International Conference on Recrystallization and Grain Growth (ReX&GG 2016), 191–96. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119328827.ch28.

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Lu, Zheng, Lijuan Li, Wenming Nan, Xiang Jiang, and Qijie Zhai. "Effect of Electric Current Pulse on Grain Boundary of Grain Oriented Silicon Steel during Primary Recrystallization Annealing." In Energy Technology 2015, 251–62. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093220.ch28.

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Lu, Zheng, Lijuan Li, Wenming Nan, Xiang Jiang, and Qijie Zhai. "Effect of Electric Current Pulse on Grain Boundary of Grain Oriented Silicon Steel during Primary Recrystallization Annealing." In Energy Technology 2015, 255–62. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48220-0_28.

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8

Arita, Y., and Yoshiyuki Ushigami. "Effect of Aluminum and Titanium Content on Grain Growth, Texture and Magnetic Properties in 3%Si Non-Oriented Electrical Steel." In THERMEC 2006, 4428–33. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.4428.

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9

He, Youliang, Mehdi Mehdi, Tihe Zhou, Chad Cathcart, Peter Badgley, and Afsaneh Edrisy. "Effect of Hot Band Annealing and Final Annealing Temperatures on the Texture, Grain Size, and Magnetic Properties of 1.2 wt% Si Non-oriented Electrical Steel." In The Minerals, Metals & Materials Series, 397–407. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92381-5_36.

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Тези доповідей конференцій з теми "Grain-Oriented electrical steels"

1

Samimi, Arash A., Thomas W. Krause, and Lynann Clapham. "Flux controlled magnetic barkhausen noise measurements on grain oriented electrical steels." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 31. AIP, 2012. http://dx.doi.org/10.1063/1.4716376.

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Magdaleno-Adame, Salvador, Themistoklis D. Kefalas, Anahita Fakhravar, and Juan Carlos Olivares-Galvan. "Comparative Study of Grain Oriented and Non–Oriented Electrical Steels in Magnetic Shunts of Power Transformers." In 2018 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC). IEEE, 2018. http://dx.doi.org/10.1109/ropec.2018.8661396.

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Soares, Guilherme Corrêa, Berenice Mendonça Gonzalez, and Leandro de Arruda Santos. "STRAIN HARDENING BEHAVIOR OF DUAL PHASE, NON-GRAIN ORIENTED ELECTRICAL AND AISI 304 STEELS." In 70º Congresso Anual da ABM. São Paulo: Editora Blucher, 2018. http://dx.doi.org/10.5151/1516-392x-26445.

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Cheng, Ling, Fuyao Yang, Yu Han, Guang Ma, Xin Chen, and Li Meng. "Analysis of Magnetic Performance and Magnetostrictive Properties of Grain-Oriented Electrical Steels under DC Bias Condition." In 2018 International Conference on Power System Technology (POWERCON). IEEE, 2018. http://dx.doi.org/10.1109/powercon.2018.8601943.

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Dupont, Prescillia, Manar Nesser, Olivier Maloberti, Julien Dupuy, Marc Lamblin, Maxime Ployard, Daniel Laloy, and Jerome Fortin. "Experimental impact of pulsed laser irradiation, scribing and ablation on 2-D scalar and vector magnetic losses and general properties of Grain-Oriented Electrical Steels." In 2021 IEEE International Magnetic Conference (INTERMAG). IEEE, 2021. http://dx.doi.org/10.1109/intermag42984.2021.9579742.

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Chwastek, K., A. P. S. Baghel, P. Borowik, B. S. Ram, and S. V. Kulkarni. "Loss separation in chosen grades of grain-oriented steel." In 2016 Progress in Applied Electrical Engineering (PAEE). IEEE, 2016. http://dx.doi.org/10.1109/paee.2016.7605105.

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Hamdinou, Sidi, Daniel Roger, Mathieu Rossi, and Thierry Belgrand. "Solid State Transformer based on Grain-Oriented Electrical Steel Wound Cores." In 2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG). IEEE, 2019. http://dx.doi.org/10.1109/cpe.2019.8862413.

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8

Pei, Ruilin, Lubin Zeng, Shuhui Li, and Tim Coombs. "Studies on grain-oriented silicon steel used in traction motors." In 2017 20th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2017. http://dx.doi.org/10.1109/icems.2017.8056324.

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9

Ma, J., R. Qu, and J. Li. "A novel axial flux switched reluctance motor with grain oriented electrical steel." In 2015 IEEE International Magnetics Conference (INTERMAG). IEEE, 2015. http://dx.doi.org/10.1109/intmag.2015.7156545.

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10

Wang, Hao, Changsheng Li, Ban Cai, Deniz Perin, and Nkwachukwu Chukwuchekwa. "Models between Barkhausen noise and coercive force of grain-oriented electrical steel." In THE 11TH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN INDUSTRIAL FORMING PROCESSES: NUMIFORM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4806934.

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Звіти організацій з теми "Grain-Oriented electrical steels"

1

3% Silicon Steel Core Material (Grain Oriented Electrical Steel). Office of Scientific and Technical Information (OSTI), September 2018. http://dx.doi.org/10.2172/1604960.

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6.5% Silicon Steel Core Material (Non-Grain Oriented Electrical Steel). Office of Scientific and Technical Information (OSTI), September 2018. http://dx.doi.org/10.2172/1604965.

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