Influence of hot rolling reduction rate on the microstructure, texture and magnetic properties of a strip-cast Fe-6.5 wt% Si grain-oriented electrical steel

Different alloy composition has a significant effect on the magnetic properties of non-oriented electrical steel . Alloy composition effected recrystallization of product through the effect of hot rolling plate grain size, then effected magnetic properties. Supposing everything other component and process remain equal, the iron loss significantly decreased and magnetic induction deterioration was not obvious with the increase of Manganese element and the grain size increases.

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The Precipitation of Copper in the Non-Oriental Electrical Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.2279 ◽

2005 ◽

Vol 475-479 ◽

pp. 2279-2282 ◽

Cited By ~ 1

Author(s):

Ben Xu ◽

Youguo Li ◽

Yong Feng Gong

Keyword(s):

Magnetic Properties ◽

Hot Rolling ◽

Electrical Steel ◽

Texture Development ◽

Steel Sheets ◽

Copper Addition ◽

Normalization Process

The precipitation of copper in the non-oriental electrical steel was studied in this article. These precipitation particles, which influenced both the texture development and the magnetic properties of the steel sheets, appeared in the hot-rolling strips and grew up in the later normalization process. Their composition, morphology and crystallography had been investigated using TEM. Differed from the MnS and AlN that studied in the previous papers, these precipitate particles were found to be CuAl2. It suggested that these particles might stimulate the recrystallization nucleation of the {110} oriented grains and restrain the development of {111} oriented grains in the sheet of non-oriented electrical steel. This might be another explanation to the improvement on magnetic properties of the non-oriental electrical steel containing copper addition.

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Deformation and Fracture Behavior of Surface Oxide Scale on Fe-13Cr Alloy in Hot-Rolling Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.522-523.461 ◽

2006 ◽

Vol 522-523 ◽

pp. 461-468 ◽

Cited By ~ 1

Author(s):

Y. Hidaka ◽

T. Anraku ◽

Nobuo Otsuka

Keyword(s):

Oxide Scale ◽

Hot Rolling ◽

Reduction Rate ◽

Rolling Process ◽

Surface Oxide ◽

Rolling Reduction ◽

Outer Scale ◽

Hot Rolling Process ◽

Micro Cracks ◽

Inner Scale

The behavior of the surface oxide scale on steel products during hot rolling process influences the surface properties of final products. To investigate the deformation and the fracture behavior of surface oxide scale of Fe-13Cr alloy, a hot rolling test was carried out. The oxide scale rolled out was observed in detail by using TEM. The specimen was hot-rolled after oxidation at 1100 for 90 minutes in air. The hot rolling tests with two conditions (. The hot rolling test of the outer scale {=whole layer scale} , . The hot rolling test of the inner scale that removed the outer scale) were carried out. The rolling reduction rate was 25, 44, 58, and 68%. The outer scale was composed of Fe2O3 and F3O4, and the inner scale was composed of Fe3O4, FeCr2O4, and a small amount of Fe2SiO4. Fe2SiO4 formed along the grain boundaries of the other oxides (Fe3O4, FeCr2O4) was observed by TEM. In the test , Fe2O3 of the outer scale was pulverized to fine particle that looks like red powder, and Fe3O4 of the outer scale was cracked by hot rolling. A ductility-like behavior was observed in the inner scale (Test ). That is, it was found by the SEM observation that porosity and micro cracks of the surface oxide disappeared gradually according to the increase in the rolling reduction. It was thought that the porosity and the micro cracks eased the compression stress caused by hot rolling. In the case of high reduction rate, FeSi2O4 ,which is a low melting point oxide, formed on grain boundary caused grain boundary slipping. When the rolling reduction is very high, plastic deformation by dislocation occurred in Fe3O4 and FeCr2O4. However, these oxides were broken, when their plasticity would not be able to accept considerably high rolling reduction.

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Effect of Rolling Reduction Rate on the Microstructure of Hot Rolling Stainless Steel Clad Plate

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/394/3/032123 ◽

2018 ◽

Vol 394 ◽

pp. 032123 ◽

Cited By ~ 1

Author(s):

Herong Jin ◽

Lei Zhang ◽

Yali Yi

Keyword(s):

Stainless Steel ◽

Hot Rolling ◽

Reduction Rate ◽

Rolling Reduction ◽

Stainless Steel Clad Plate

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Influence of hot deformation on texture and magnetic properties of strip cast non-oriented electrical steel

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2018.05.015 ◽

2018 ◽

Vol 462 ◽

pp. 205-215 ◽

Cited By ~ 14

Author(s):

Haitao Jiao ◽

Yunbo Xu ◽

Haijie Xu ◽

Yuanxiang Zhang ◽

Wei Xiong ◽

...

Keyword(s):

Magnetic Properties ◽

Hot Deformation ◽

Electrical Steel ◽

Strip Cast

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Integrated Process Simulation of Non-Oriented Electrical Steel

Materials ◽

10.3390/ma14216659 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6659

Author(s):

Anett Stöcker ◽

Max Weiner ◽

Grzegorz Korpała ◽

Ulrich Prahl ◽

Xuefei Wei ◽

...

Keyword(s):

Grain Size ◽

Magnetic Properties ◽

Cold Rolling ◽

Process Parameters ◽

Hot Rolling ◽

Electrical Steel ◽

Sheet Thickness ◽

Electrical Steels ◽

Heterogeneous Microstructures ◽

The Impact

[d=A]A tailor-made microstructure, especially regarding grain size and texture, improves the magnetic properties of non-oriented electrical steels. One way to adjust the microstructure is to control the production and processing in great detail. Simulation and modeling approaches can help to evaluate the impact of different process parameters and finally select them appropriately. We present individual model approaches for hot rolling, cold rolling, annealing and shear cutting and aim to connect the models to account for the complex interrelationships between the process steps. A layer model combined with a microstructure model describes the grain size evolution during hot rolling. The crystal plasticity finite-element method (CPFEM) predicts the cold-rolling texture. Grain size and texture evolution during annealing is captured by the level-set method and the heat treatment model GraGLeS2D+. The impact of different grain sizes across the sheet thickness on residual stress state is evaluated by the surface model. All models take heterogeneous microstructures across the sheet thickness into account. Furthermore, a relationship is established between process and material parameters and magnetic properties. The basic mathematical principles of the models are explained and demonstrated using laboratory experiments on a non-oriented electrical steel with 3.16 wt.% Si as an example. Improving the magnetic properties of non-oriented electrical steels are of high interest. In this context, improvement by a tailor-made microstructure, especially regarding grain size and texture, is one focus. One way to adjust the microstructure is to control the production and processing in great detail. Simulation and modeling approaches, emphasizing grain size and texture development, can help to evaluate and finally set process parameters. Here, we present individual model approaches for hot rolling, cold rolling, annealing and shear cutting and aim to connect the models to account for the complex interrelationships between the process steps. Furthermore, a connection between the process parameters and the magnetic properties is drawn. Grain size, grain size distribution, texture and dislocation density are the main transfer parameters in between the models. All models take heterogeneous microstructures across the sheet thickness into account. The basic mathematical principles of the models are explained, and a case study is presented in each case using FeSi3.2wt%Si as an example material.

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