The Effect of Cold Rolling Direction on the Secondary Recrystallization in Fe-3%Si Steel

2011 ◽  
Vol 702-703 ◽  
pp. 591-594
Author(s):  
Kyung Jun Ko ◽  
Hyung Ki Park ◽  
Chan Hee Han
Keyword(s):  
Cold Rolling ◽  
Hot Rolling ◽  
Rotation Angle ◽  
Rolling Direction ◽  
Secondary Recrystallization ◽  
Rolled Sheet ◽  
Goss Texture ◽  
Cold Rolled ◽  
Hot Rolled ◽  
Similar Texture

In order to verify the origin of Goss nuclei for secondary recrystallization in Fe-3%Si steel, the effect of cold-rolling direction on the secondary recrystallization was examined in this study. The cold-rolling direction was rotated through 0 ~ 90 degrees about the hot-rolling direction on normal direction axis of hot-rolled sheet. In spite of the different initial texture before cold rolling, the 88% cold rolled texture was formed by similar α and γ fiber regardless of the rotation of cold rolling direction. Likewise, regardless of the cold rolling direction, the primary recrystallized sheets had a similar texture. In particular, the area fraction of Goss component (tolerance angle within 15º) in the primary recrystallized sheets was increased in the cold rolling condition of rotating through 60, 90 degrees from the hot rolling direction. After high temperature annealing at 1200°C, the secondary recrystallized grain was fully evolved in the all conditions. The sharpness of Goss texture in secondary recrystallized sheet was decreased as increasing the rotation angle of cold rolling direction.

Study of Local Microstructure and Texture Heterogeneities in Hot Rolled CGO Fe-3%Si Sheets

2004 ◽  
Vol 467-470 ◽  
pp. 123-128 ◽  
Author(s):  
Francisco Cruz-Gandarilla ◽  
Thierry Baudin ◽  
Richard Penelle ◽  
Hector Mendoza León
Keyword(s):  
Hot Rolling ◽  
Secondary Recrystallization ◽  
Processing Route ◽  
Rolled Sheet ◽  
X Ray Diffraction ◽  
Goss Texture ◽  
Abnormal Growth ◽  
Grain Formation ◽  
Hot Rolled ◽  
Electron Back Scattered Diffraction

After secondary recrystallization, the Fe-3%Si alloys, grade Conventional Grain Oriented (C.G.O.), exhibit a Goss texture that is sought for minimizing watt losses in transformer cores. The mechanisms of Goss grain formation and their evolution during the processing route from hot rolling to decarburizing such as the early first steps of abnormal growth are not still well cleared up. This work deals with the influence of local microstructure and texture heterogeneities observed by X-ray diffraction (XRD) and Electron Back Scattered Diffraction (EBSD) at the hot rolling step. The present results complete those previously obtained by neutron diffraction [1]. Presence of Goss grain colonies at about the quarter of the hot rolled sheet is probably, as it has already been suggested, at the origin of the Goss grain presence at the primary recrystallized state.

Effect of Hot-Rolled Microstructure on the Recrystallization Texture of Cold-Rolled Non-Oriented Electrical Steel

2011 ◽  
Vol 298 ◽  
pp. 203-208 ◽  
Author(s):  
Zi Li Jin ◽  
Wei Li ◽  
Yi Ming Li
Keyword(s):  
Cold Rolling ◽  
Electrical Steel ◽  
Texture Evolution ◽  
Steel Strip ◽  
Silicon Steel ◽  
Grain Structure ◽  
Recrystallization Annealing ◽  
Rolled Sheet ◽  
Cold Rolled ◽  
Hot Rolled

With the help of orientation distribution function (ODF) analysis, experiments of different hot band grain microstructure 0.33% silicon steel were cold-rolled and annealed in the laboratory，to study the effect of the microstructure hot-rolled steel strip for cold rolled non-oriented silicon steel microstructure and texture of recrystallization annealing. The results show that hot rolled microstructure on cold rolled Non-Oriented Electrical Steel cold-rolled sheet evolution of texture and recrystallization have important influence, the quiaxed grain structure of steel by cold rolling and recrystallization annealing, the recrystallization speed than the fiber grain-based mixed crystals recrystallization fast , With the equiaxed grains made of cold rolled silicon steel after annealing the {110}<UVW> texture components was enhanced and {100}<uwv> texture components weakened. Different microstructure condition prior to cold rolling in the recrystallization annealing process the texture evolution has the obvious difference, the equiaxial grain steel belt cold rolling and annealing, has the strong crystal orientation. This shows that the equiaxed grain when hot microstructure is detrimental to the magnetic properties of cold-rolled non-oriented silicon steel to improve and increase.

scholarly journals Influence of Hot Rolling Condition on the Final Microstructure of Non-Oriented Electrical Steel Fe-3.2 wt.% Si

2016 ◽  
Vol 854 ◽  
pp. 16-21 ◽  
Author(s):  
Anett Stöcker ◽  
Armin Franke ◽  
Harti Hermann ◽  
Rudolf Kawalla
Keyword(s):  
Cold Rolling ◽  
Hot Rolling ◽  
Electrical Steel ◽  
Final Thickness ◽  
Annealed Material ◽  
Cooling Conditions ◽  
Final Microstructure ◽  
Cold Rolling And Annealing ◽  
Cold Rolled ◽  
Hot Rolled

In this paper the microstructure evolution of an iron-silicon alloy with 3.2 wt.% silicon throughout the manufacturing stages hot rolling, cold rolling and annealing is presented. Starting with a 35 mm thick feedstock, which was hot rolled to 1 mm, with different cooling conditions, the material was cold rolled to a final thickness of 0.3 mm and final annealed under same conditions to show the influence of the hot rolling on the texture and microstructure of the final annealed material.

The Effect of Hot-Rolled Coiling Time on the Texture of a New Cold-Rolled Non-Oriented Electric Steel

2011 ◽  
Vol 194-196 ◽  
pp. 375-378
Author(s):  
Guan Qiao Hu ◽  
Yan Ping Zeng ◽  
Hai Lin Chen
Keyword(s):  
Hot Rolling ◽  
Electrical Steel ◽  
Volume Fraction ◽  
Test Results ◽  
Electric Steel ◽  
Coiling Temperature ◽  
Goss Texture ◽  
Cold Rolled ◽  
Hot Rolled

The effects of hot-rolling coiling time on texture of a new cold-rolled non-oriented electrical steel containing copper were investigated. The test results showed that the final product texture consists of γ-fibr textures, α-fibre textures and Goss. With adding coiling time ,the density of {111}<110> and {112}<110> decreased,the inverse Goss texture {001}<110> increased. The volume fraction of {100} raised with coiling time. As a certain coiling temperature, it can improve the intensity of textures {100},{110}at proper coiling time.

The Influence of Hot Rolling Technological Parameters on Microstructure of Low Temperature Grain-Oriented Silicon Steel

2011 ◽  
Vol 396-398 ◽  
pp. 1841-1845
Author(s):  
Yun Li Feng ◽  
Xue Jing Qi ◽  
Meng Song
Keyword(s):  
Hot Rolling ◽  
Room Temperature ◽  
Secondary Recrystallization ◽  
Silicon Steel ◽  
Rolled Strip ◽  
Technological Parameters ◽  
Coiling Temperature ◽  
Goss Texture ◽  
Gleeble 3500 ◽  
Hot Rolled

The process of hot rolling Fe-3.15% Si steel is simulated by Gleeble-3500 thermal mechanical simulator, the influence of finishing temperature, coiling temperature and cooling rates after rolling on microstructure of Fe-3.15% Si steel are mainly researched, and the influence of hot rolled microstructure on Goss texture, secondary recrystallization and magnetic property are analysed. The results show that the nonuniform microstructures of hot rolled strip play an important role in developing the perfect secondary recrystallization. Fe-3.15% Si steel is rough rolled at 1110°C, finished rolled at 880°C, subsequently cooled to 550°C for coiling at rate of 10°C/s, then air cooled to room temperature. The above mentioned process could produce hot-rolled microstructure which are benefit to formation of Goss texture and the development of perfect secondary recrystallization.

scholarly journals Microstructure and Mechanical Properties of the Cold-Rolled Mg-14Li-1Zn Alloy after Hot Rolling

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Qiang Wu ◽  
Kunning Fu ◽  
Ruizhi Wu ◽  
Jinghuai Zhang ◽  
Legan Hou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cold Rolling ◽  
Hot Rolling ◽  
Rolling Temperature ◽  
Homogeneous Microstructure ◽  
Microstructure And Mechanical Properties ◽  
Different Temperatures ◽  
Cold Rolled ◽  
Hot Rolled

The as-cast Mg-14Li-1Zn alloy was hot rolled at different temperatures with the reduction of 50%, followed by cold rolling with the reduction of 80%. The effects of the hot rolling temperature on the microstructure and mechanical properties of the final specimens were investigated. The results show that the higher rolling temperature brings about a more homogeneous microstructure, which is favorable for the subsequent cold rolling. When the hot rolling temperature is 300°C, the final specimen possesses the highest tensile strength and hardness of 238 MPa and 67.7 HV, respectively. When the hot rolling temperature is 200°C, the final specimen possesses the highest elongation of 24.6%.

scholarly journals Mechanical Properties and Textures of Particulatereinforced Aluminum Alloy Matrix Composite Under Hot- and Cold-Rolling Conditions

1998 ◽  
Vol 31 (1-2) ◽  
pp. 43-52 ◽  
Author(s):  
L. Q. Chen ◽  
Y. X. Lü ◽  
C. S. Lee ◽  
J. Bi ◽  
R. K. Y. Li
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Cold Rolling ◽  
Rolling Texture ◽  
Rolled Sheet ◽  
Alloy Matrix ◽  
Cold Rolled ◽  
Aluminum Alloy Matrix ◽  
Hot And Cold Rolling ◽  
Hot Rolled

A study has been made on the mechanical properties of an aluminum alloy matrix (Al–3.0wt% Cu–1.5 wt% Mg–0.4wt% Mn)composites reinforced with a volume fraction of 15% silicon carbide under hot- and cold-rolling conditions. The preferred crystallite orientation distribution functions (ODFs) of these rolled sheets were measured. The tensile test results showed that the ultimate tensile strength and plasticity of the hot-rolled composite sheet are better than those of the cold-rolled one. However, the cold-rolled sheet specimen exhibits much higher 0.2% offset yield strength than that in the case of hot rolling. The cold-rolling texture of this sheet composite is obtained from the development of hot-rolled texture only by a little rotation about the related axes. It consists of random texture and three weak components, {001}〈110〉, {110}〈112〉 and {3314}〈773〉, while the hot rolling texture of the metal-matrix composite (MMC) sheet is almost random under the rolling reduction employed. The preferred grain orientation has effect on the yield strength and no much influence on the ultimate tensile strength of the cold rolled sheet. The decrease in the ultimate tensile strength of the cold-rolled specimen is mainly attributed to the micro-damages in the microstructure produced during cold rolling.

Evolution of microstructure, texture and inhibitor of medium temperature grain-oriented silicon steel

2020 ◽  
Vol 117 (5) ◽  
pp. 510
Author(s):  
Li-Feng Fan ◽  
Xing-Yuan Zhao ◽  
Li-Jun Xiao ◽  
Jiao Huang ◽  
Yuan Xiang Zhang
Keyword(s):  
Surface Layer ◽  
Cold Rolling ◽  
Average Particle Size ◽  
Fiber Texture ◽  
Average Particle ◽  
Central Layer ◽  
Medium Temperature ◽  
Goss Texture ◽  
Average Grain Size ◽  
Hot Rolled

The medium temperature reheating and two-stage cold rolling process were adopted to produce industrialized Grain-oriented silicon steel. Results showed there were three sections (surface layer, transition layer and central layer) along the thickness direction on hot rolled sheets. Surface layer was occupied by complete recrystallization grains with average grain size 42.81 µm, while the central layer mainly consisted of fibrous microstructure. The Goss texture appeared only on surface layer with content 3.44%∼3.65%. After the first cold rolling with 72% reduction and decarburization annealing, the primary recrystallization occurred and average grains size reached 19.0 µm, simultaneously accompanied with texture rotated to λ, γ fiber texture and Goss texture dropped to 2.89%. Adopting the second cold rolling with 58% reduction, the cold rolled sheet consisted of deformed fiber microstructure and the texture maintained γ fiber texture with a peak at {111} <112>. The precipitates in hot rolled sheets comprised Cu2S and few AlN, and the average particle size was ∼14 nm. The inhibitors in the decarburization annealing sheet were mainly AlN, Cu2S, MnS and their composite precipitation, which were spherical or massive with the average particle size ∼21 nm. The single Goss oriented grains with average grain size 9.41 mm were obtained after high temperature annealing, and the intensity reached 873.30. The final magnetic properties were: B8 = 1.865 T and P1.7/50 = 1.124 W/kg, which met the requirement of 27Q120.

Structure and Mechanical Properties of Asymmetrically Rolled IF Steel Sheet

2010 ◽  
Vol 654-656 ◽  
pp. 1255-1258 ◽  
Author(s):  
Dmitry Orlov ◽  
Rimma Lapovok ◽  
László S. Tóth ◽  
Ilana B. Timokhina ◽  
Peter D. Hodgson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Steel Sheet ◽  
Rolling Direction ◽  
If Steel ◽  
Asymmetric Rolling ◽  
Cold Rolled ◽  
Hot Rolled ◽  
If Steel Sheet

As-received hot-rolled 5.6 mm thick IF steel sheet was symmetrically/asymmetrically cold rolled at room temperature down to 1.9 mm. The asymmetric rolling was carried out in monotonic (an idle roll is always on the same side of the sheet) and reversal (the sheet was turned 180º around the rolling direction between passes) modes. Microstructure, texture and mechanical properties were analysed. The observed differences in structure and mechanical properties were modest, and therefore further investigation of the effects of other kinds of asymmetry is suggested.

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