scholarly journals Evolution of Goss Orientation during Thermal Heating with Different Heating Rate for Primary Recrystallization in Grain-oriented Electrical Steel

2013 ◽  
Vol 53 (1) ◽  
pp. 125-130 ◽  
Author(s):  
No-Jin Park ◽  
Hyung-Don Joo ◽  
Jong-Tae Park
Keyword(s):  
Heating Rate ◽  
Electrical Steel ◽  
Primary Recrystallization ◽  
Thermal Heating ◽  
Goss Orientation

scholarly journals Investigation of Primary Recrystallization and Decarbonization with Different Heating Rates of Intermediate Annealing Using Nb-Containing Grain-Oriented Silicon Steel

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1655
Author(s):  
Xin Tian ◽  
Shuang Kuang ◽  
Jie Li ◽  
Jing Guo ◽  
Yunli Feng
Keyword(s):  
Heating Rate ◽  
Electron Backscatter Diffraction ◽  
Optical Microscope ◽  
Primary Recrystallization ◽  
Silicon Steel ◽  
Intermediate Annealing ◽  
Heating Rates ◽  
Average Grain Size ◽  
The Matrix ◽  
20 Nm

An Nb-containing grain-oriented silicon steel was produced through double-stage cold rolling in order to investigate the effect of the heating rate during intermediate annealing on primary recrystallization and decarburization behavior. The microstructure and texture were observed and analyzed by an optical microscope and an electron backscatter diffraction system. A transmission electron microscope was used to observe the precipitation behavior of inhibitors. The decarburization effect during intermediate annealing was also calculated and discussed. The results show that primary recrystallization takes place after intermediate annealing. As the heating rate increases, the average grain size decreases gradually. The textures of {411}<148> and {111}<112> were found to be the strongest along the thickness direction in all of the annealed specimens and are mainly surrounded by HEGB and HAGB (> 45°). A large number of inhibitors with the size of 14~20 nm precipitate are distributed evenly in the matrix. The above results indicate that the higher heating rate during intermediate annealing contributes to both an excellent microstructure and magnetic properties. From the calculation, as the heating rate increases, decarbonization tends to proceed in the insulation stage, and the total amount of carbonization declines.

The Origins of the Goss Orientation in Non‐Oriented Electrical Steel and the Evolution of the Goss Texture during Thermomechanical Processing

2019 ◽  
Vol 90 (7) ◽  
pp. 1800582 ◽  
Author(s):  
Mehdi Mehdi ◽  
Youliang He ◽  
Erik J. Hilinski ◽  
Leo A. I. Kestens ◽  
Afsaneh Edrisy
Keyword(s):  
Electrical Steel ◽  
Thermomechanical Processing ◽  
Goss Texture ◽  
Goss Orientation

Mechanism of Grain Growth During Annealing of Si-Al Electrical Steel Strips Deformed in Tension

2010 ◽  
Vol 1276 ◽  
Author(s):  
J. Salinas B ◽  
A. Salinas R
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Electrical Steel ◽  
Electron Backscatter Diffraction ◽  
Steel Strip ◽  
Boundary Migration ◽  
Primary Recrystallization ◽  
Steel Strips ◽  
Grain Orientation Spread ◽  
Quality Maps

AbstractThe mechanism of recrystallization as a result of annealing during 600–7200 seconds at 700 °C of a Si-Al, low C electrical steel strip is investigated in samples deformed in tension. The evolution of grain size during annealing is evaluated by optical microscopy and electron backscatter diffraction in the scanning electron microscope. It is found that grain growth starts after an incubation time of 600 s with no apparent evidence of primary recrystallization. After that, the grain size-time relationship exhibits two different stages. Initially, the grain size increases linearly with time up to about 3600 s. During this time, some selected grains grow until they consume the deformed microstructure. In the second stage, the rate of growth decreases significantly and a final grain size of about 150 m is reached after 7200 seconds of annealing. Grain orientation spread maps obtained from EBSD data of deformed and partially recrystallized samples during the stage of linear growth reveals that the growing grains exhibit lower misorientation and therefore smaller stored energy than the non-recrystallized matrix grains. Analysis of image quality maps reveal that the IQ values for {100}<uvw>orientations are higher than those observed for {111}<uvw>orientations thus suggesting that the {100}<uvw>orientations grow at the expense of {111}<uvw>orientations by a mechanism of strain-induced boundary migration.

Effect of annealing temperature and heating rate on the magnetic and mechanical properties of electrical steel

1996 ◽  
Vol 160 ◽  
pp. 133-135 ◽  
Author(s):  
X. Duan ◽  
H. Huneus ◽  
T. Kochmann ◽  
K. Leuridan ◽  
R. Kaczmarek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heating Rate ◽  
Annealing Temperature ◽  
Electrical Steel

scholarly journals Complete Goss Secondary Recrystallization by Control of the Grain Size and Texture of Primary Recrystallization in Grain-Oriented Silicon Steel

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5383
Author(s):  
Zhanyi Xu ◽  
Yuhui Sha ◽  
Zhenghua He ◽  
Fang Zhang ◽  
Wei Liu ◽  
...  
Keyword(s):  
Grain Size ◽  
Secondary Recrystallization ◽  
Coincident Site Lattice ◽  
High Energy ◽  
Primary Recrystallization ◽  
Slow Heating ◽  
Matrix Microstructure ◽  
High Efficient ◽  
Goss Orientation ◽  
Evolution Of Microstructure

Matrix microstructure and texture controlling is an important way to optimize Goss ({110}<001>) abnormal grain growth (AGG) in high magnetic induction grain-oriented silicon (Hi-B) steel during primary recrystallization. In the present work, a matrix with homogeneous grain size and favorable texture components was obtained through two-stage normalized annealing followed by primary recrystallization. Furthermore, secondary recrystallization was performed for sharp Goss orientation by slow heating and purified annealing. It was found that plenty of island grains, which occurred and disappeared gradually, accompanied the process of AGG. Through analyzing the evolution of microstructure and texture, we realized that the formation of island grains was related to the large-size grains in matrix, and the elimination of that was attributed to the special grain boundaries which satisfied both coincident site lattice (CSL) and high-energy (HE) models. It was essential to control grain size and favorable orientations in matrix comprehensively for the high-efficient abnormal growing of sharp Goss orientation, through which excellent magnetic properties could be obtained simultaneously.

scholarly journals Effect of Heating Rate on the Development of Annealing Texture in a 1.09 wt.% Si Non-oriented Electrical Steel

2016 ◽  
Vol 56 (2) ◽  
pp. 326-334 ◽  
Author(s):  
Shu-Yu Wu ◽  
Chun-Hung Lin ◽  
Wei-Chih Hsu ◽  
Liuwen Chang ◽  
Pei-Ling Sun ◽  
...  
Keyword(s):  
Heating Rate ◽  
Electrical Steel ◽  
Annealing Texture

Influence of High-Mobility Boundaries on the Selective Growth of Goss Grain in Grain-Oriented Electrical Steel

2010 ◽  
Vol 638-642 ◽  
pp. 3430-3434
Author(s):  
Takeshi Omura ◽  
Yasuyuki Hayakawa
Keyword(s):  
Grain Boundary ◽  
Heating Rate ◽  
Crystal Orientation ◽  
Electrical Steel ◽  
Secondary Recrystallization ◽  
High Mobility ◽  
Selective Growth ◽  
Experimental Result ◽  
Recrystallization Annealing ◽  
Good Agreement

Behavior of the selective growth of Goss grains in grain-oriented electrical steel was investigated by controlling the heating rate in secondary recrystallization annealing．It was clarified that the important factors on the selective growth of Goss grains were the frequency and the mobility of grain boundary. It was demonstrated that boundaries having misorientation angle between 30 degree and 35 degree had the greatest influence on the selective growth, and the change of crystal orientation of secondary recrystallized grains expected by analyzing the change of primary recrystallized texture during secondary recrystallization annealing showed good agreement with the experimental result.

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