scholarly journals Texture Control During the Manufacturing of Nonoriented Electrical Steels

2008 ◽  
Vol 2008 ◽  
pp. 1-9 ◽  
Author(s):  
Leo Kestens ◽  
Sigrid Jacobs
Keyword(s):  
Steel Sheet ◽  
Electrical Steel ◽  
Correlation Study ◽  
Texture Parameter ◽  
Electrical Steels ◽  
Processing Strategies ◽  
Quantum Leap ◽  
Steel Grades ◽  
Surface Annealing

Methods of modern quantitative texture analysis are applied in order to characterize the crystallographic texture of various non-oriented electrical steel grades in view of their relation with the magnetic properties of the steel sheet. A texture parameter is defined which quantifies the density of ‹100› easy magnetic directions in the sheet planes. An extensive correlation study revealed the relation of this parameter with the hysteresis losses, determined at an induction of 1.5 T, and with the induction measured at an applied external field of 25 A/cm. It is shown that the latter magnetic property is the more texture dependent, whereas the former one is more sensitive to the grain size of the steel. Also various strategies for texture control are critically reviewed. It is shown that the conventional manufacturing process only provides poor tools for optimizing the texture of the final product. In order to obtain a quantum-leap improvement of the magnetic quality of the texture, in combination with other important microstructural features, nonstandard processing strategies are required, such as cross-rolling, two-stage cold rolling, or surface annealing.

On the Effect of Texture in Experimental Grades of High-Silicon Electrical Steel

2007 ◽  
Vol 539-543 ◽  
pp. 3341-3346
Author(s):  
Yvan Houbaert ◽  
Tanya Ros-Yáñez ◽  
Pablo Rodriguez-Calvillo ◽  
José Barros ◽  
Leo Kestens
Keyword(s):  
Cold Rolling ◽  
Electrical Steel ◽  
Texture Evolution ◽  
Diffusion Annealing ◽  
Texture Parameter ◽  
Al Content ◽  
First Results ◽  
High Silicon ◽  
Hot And Cold Rolling

Crystallographic texture has an important effect on the magnetic quality of electrical steel: a specific texture parameter A is defined and used to estimate the magnetic quality of texture components. It is shown that obtaining the best possible texture in non oriented electrical steel can reduce the losses with 1,5 W/kg. Two production schemes for high silicon electrical steel are described: a conventional processing through hot and cold rolling with adequate temperatures and cooling rates and an immersion-diffusion process by hot dipping in a Si- and Al-rich bath followed by diffusion annealing. The texture evolution in these experimental materials is under study and first results are reported for conventional alloys (rolling procedure) and for immersion-diffusion alloys, which are annealed after dipping in order to obtain a controlled concentration gradient with high Si and/or Al at the surface or a homogeneous Si and/or Al-content over the thickness.

scholarly journals Estimation of the domestic materials application possibility in the active part of a high-speed electric generator for micro-GTP

2021 ◽  
Vol 2131 (4) ◽  
pp. 042075
Author(s):  
P G Kolpahchyan ◽  
M S Podbereznaya ◽  
M S Alexandrova ◽  
V V Baibichyan
Keyword(s):  
High Speed ◽  
Electrical Steel ◽  
Magnetic Circuit ◽  
Treatment Mode ◽  
Electric Generator ◽  
Micro Gas Turbine ◽  
Heat Treatment Mode ◽  
Steel Grades ◽  
Steel Aisi

Abstract The article discusses the possibility of using domestic materials in a high-speed electric generator. The features of Japanese electrical steel 20NTN1500 and domestic-made electrical steel grades 2420 and 2421 for the stator magnetic circuit are shown. The features of American steel AISI 455 and structural steel grades Steel 40, Steel 40H, Steel 45 are considered in the case of a rotor. A feature of the use of structural steels in the design of the high-speed electric generator rotor for micro-gas turbine plants is the need for precise observance of the rotor heat treatment mode after its manufacture, control of the dimensions and quality of surface treatment.

Study on Environment Friendly Insulated Coating for Non-Oriented Electrical Steel Sheet

2013 ◽  
Vol 634-638 ◽  
pp. 3002-3007
Author(s):  
Xue Qiang Dong ◽  
Tai Xiong Guo ◽  
Quan Xu ◽  
Xi Yin ◽  
Chang Rong Ran
Keyword(s):  
Steel Sheet ◽  
Electrical Steel ◽  
Curing Temperature ◽  
Insulation Resistance ◽  
Excellent Performance ◽  
Environment Friendly ◽  
Electrical Steels ◽  
Film Forming ◽  
Higher Temperature ◽  
Electrical Steel Sheet

At presant, most of the insulated coatings for non-oriented electrical steels contain chromium, and which need to be cured at a higher temperature. On the basis of analyzing the characteristic of the film-forming substance, a environment friendly insulated coating that have lower curing temperature for non-oriented electrical steel sheet is developed and coating process is studied as well, then measured the adhesion, insulation resistance, heat resistance, corrosion resistance and other properties of the coating. The results showed that, the coating can be fast-curing from 150°C to 250 °C, film of the coating is smooth, compact and uniform, and has excellent performance. So the new coating can meet the application requirement of the small and medium-sized motor.

Examination of Measurement Method for Magnetostriction of Electrical Steel Sheet with Lock-in Amplifier

2012 ◽  
Vol 132 (11) ◽  
pp. 1033-1038
Author(s):  
Yuichiro Kai ◽  
Yuji Tsuchida ◽  
Takashi Todaka ◽  
Masato Enokizono
Keyword(s):  
Measurement Method ◽  
Steel Sheet ◽  
Electrical Steel ◽  
Lock In ◽  
Electrical Steel Sheet

ARMCO TRAN-COR ELECTRICAL STEEL GRADE H-0

Alloy Digest ◽  
1990 ◽  
Vol 39 (9) ◽  
Keyword(s):  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Grain Orientation ◽  
Electrical Steel ◽  
Core Loss ◽  
Heat Treating ◽  
Steel Grade ◽  
Advanced Materials ◽  
Electrical Steels

Abstract Armco Tran-Cor H-0 Electrical Steel, available in coils 0.009 (0.23 mm) thickness, offers an outstanding degree of grain orientation with resultant far lower core loss than possible with conventional grain-oriented electrical steels. It is used for transformer cores. This datasheet provides information on physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating and surface treatment. Filing Code: Fe-92. Producer or source: Armco Advanced Materials Corporation.

Self Management Menentukan Kualitas Hidup Pasien Diabetes Mellitus

2019 ◽  
Vol 4 (2) ◽  
pp. 402
Author(s):  
Iskim Luthfa ◽  
Nurul Fadhilah
Keyword(s):  
Quality Of Life ◽  
Diabetes Mellitus ◽  
Correlation Study ◽  
Self Management ◽  
Rank Test ◽  
P Value ◽  
Cross Sectional ◽  
Spearman Rank ◽  
Consecutive Sampling

<p><em>People with diabetes mellitus are at risk of developing complications, so that it affects the quality of life. These complications can be minimized through self-care management. This study aims to determine the relationship between self management with the quality of life for people with diabetes mellitus. This research is a kind of quantitative research with correlation study. This research used cross sectional design. The sampling technique uses non probability with estimation consecutive sampling. The number of respondents in this research are 118 respondents. Instrument for measuring self management used diabetes self management questionnaire (DSMQ), and instruments to measure quality of life used quality of life WHOQOL-BREEF. The data obtained were processed statistically by using spearman rank test formula and p value of 0,000 There is a significant relationship of self management with the quality of life of people with diabetes mellitus.</em></p><p> </p><p><em>Penderita </em><em>Diabetes mellitus </em><em>beresiko mengalami komplikasi yang dapat mempengaruhi kualitas hidupnya. Komplikasi tersebut dapat diminimalkan melalui manajemen perawatan diri (self management). Penelitian ini bert</em><em>ujuan </em><em>untuk</em><em> menganalisis hubungan self management dengan kualitas hidup pasien diabetes melitus. </em><em>Jenis p</em><em>enelitian ini </em><em>adalah</em><em> deskriptif korelasi</em><em> dengan desain cross sectional</em><em>. Teknik pengambilan sampel menggunakan non probability </em><em>sampling </em><em>dengan pendeka</em><em>t</em><em>an consecutive sampling</em><em>.</em><em> </em><em>J</em><em>umlah </em><em>sampel sebanyak</em><em> </em><em>118 responden.</em><em> </em><em>Instrumen </em><em>penelitian </em><em>untuk mengukur self management </em><em>menggunakan</em><em> </em><em>diabetes self management questionnaire</em><em> (DSMQ), </em><em>dan instrumen untuk mengukur kualitas hidup menggunakan </em><em>quality of life </em><em>WHOQOL-BREEF.</em><em> Analisis data menggunakan spearman rank dan didapatkan hasil nilai </em><em>p value 0,000</em><em> dan r 0,394.Terdapat </em><em>hubungan </em><em>antara </em><em>self management</em><em> dengan kualitas hidup pasien diabetes mellitus</em><em> dengan arah korelasi positif.</em></p>

scholarly journals Verification of electric steel punching simulation results using microhardness

2021 ◽  
Author(s):  
Sampsa Vili Antero Laakso ◽  
Ugur Aydin ◽  
Peter Krajnik
Keyword(s):  
Plastic Deformation ◽  
High Speed ◽  
Steel Sheet ◽  
Electrical Steel ◽  
High Speed Steel ◽  
Experimental Methods ◽  
Fem Simulations ◽  
Iron Losses ◽  
Simulation Results ◽  
Electrical Steel Sheet

AbstractOne of the most dominant manufacturing methods in the production of electromechanical devices from sheet metal is punching. In punching, the material undergoes plastic deformation and finally fracture. Punching of an electrical steel sheet causes plastic deformation on the edges of the part, which affects the magnetic properties of the material, i.e., increases iron losses in the material, which in turn has a negative effect on the performance of the electromagnetic devices in the final product. Therefore, punching-induced iron losses decrease the energy efficiency of the device. FEM simulations of punching have shown significantly increased plastic deformation on the workpiece edges with increasing tool wear. In order to identify the critical tool wear, after which the iron losses have increased beyond acceptable limits, the simulation results must be verified with experimental methods. The acceptable limits are pushed further in the standards by the International Electrotechnical Commission (IEC). The new standard (IEC TS 60034-30-2:2016) has much stricter limits regarding the energy efficiency of electromechanical machines, with an IE5 class efficiency that exceeds the previous IE4 class (IEC 60034-30-1:2014) requirements by 30%. The simulations are done using Scientific Forming Technologies Corporation Deform, a finite element software for material processing simulations. The electrical steel used is M400-50A, and the tool material is Vanadis 23, a powder-based high-speed steel. Vanadis 23 is a high alloyed powder metallurgical high-speed steel with a high abrasive wear resistance and a high compressive strength. It is suitable for cold work processing like punching. In the existing literature, FEM simulations and experimental methods have been incorporated for investigating the edge deformation properties of sheared surfaces, but there is a research gap in verifying the simulation results with the experimental methods. In this paper, FEM simulation of the punching process is verified using an electrical steel sheet from real production environment and measuring the deformation of the edges using microhardness measurements. The simulations show high plastic deformation 50 μm into the workpiece edge, a result that is shown to be in good agreement with the experimental results.

Sign in / Sign up

Export Citation Format

Share Document