Evolution of microstructure and texture in grain-oriented 6.5%Si steel processed by strip-casting

Lu, Xu; Fang, Feng; Zhang, Y.X.; Wang, Y.; Yuan, Guo; Xu, Yujie; Cao, Guangming; Misra, R.D.K.; Wang, G.D.

doi:10.1016/j.matchar.2017.02.022

Cited by 34 publications

(9 citation statements)

References 26 publications

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“…With similar initial orientations, such contrasting features can be attributed to the difference in the as cast grain size and morphology between the Cast 1 (coarse columnar) and Cast 3 (fine equiaxed) ingots. In case of Cast 1, the first recrystallization would be delayed to later duration of interpass holding (post first pass) due to the coarse microstructure, thereby leading to finer grains before the second pass as compared to Cast 3 48 . These would lead to even finer equiaxed grains in the surface of hot band produced from Cast 1 as compared to that of Cast 3 (refer Fig.…”

Section: Resultsmentioning

confidence: 99%

“…From the previous studies on strip cast structure, it is evident that a strong {100}|| ND (normal direction) texture is attained in the columnar zone. This is attributed to the higher rate of heat extraction in such solidification process 38 , 39 , 48 – 50 . The crystallographic planes with highest accommodation factor grow opposite to the heat extraction direction and outrun other misaligned orientations, thereby attaining a selective texture component during growth 51 .…”

Section: Methodsmentioning

confidence: 99%

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On the through-process texture evolution assessment in grain oriented Fe-3 wt% Si steel produced by a novel directional inoculation technique

Tripathy

Chowdhury

2021

Sci Rep

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A novel directional inoculation technique has been designed to cast thin slab ingots containing Goss (or near Goss) oriented components in the as cast microstructure under the combined effect of oriented nucleation and oriented growth. The same has been targeted so as to retain Goss orientations and simultaneously develop γ fiber components (ranging from {111}<$$1\overline{1}0$$ 1 1 ¯ 0 > to {111}<112>) during hot rolling. The designed scheme of directional inoculation achieved oriented nucleation by the effect of exogenously added soft magnetic inoculants under magnetic field and oriented growth by the effect of fast cooling rates prevailing in the mould. The choice of 65Fe–35Co (wt%) system as soft magnetic inoculants was made taking into account the similarity in crystal structure and lattice parameter. The chemically synthesized inoculants under the effect of external magnetic field during solidification were able to exhibit directional inoculation. Variation in the cast microstructure and microtexture by varying the extent of inoculant addition was studied by EBSD technique. The ingots cast under different conditions were subjected to a designed hot rolling schedule and the through process microstructural and microtextural evolution was assessed. It was observed that fine equiaxed grains with initial cube orientations in the as cast structure could lead to the most desirable microstructural as well as microtextural gradient in the hot band.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

On the through-process texture evolution assessment in grain oriented Fe-3 wt% Si steel produced by a novel directional inoculation technique

Tripathy

Chowdhury

2021

Sci Rep

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“…Feng [19] studied the precipitation behavior and the texture evolution of grain-oriented silicon steel with different Nb contents and obtained relatively good magnetic properties in the conventional route. On the contrary, Lu [20] reported that the Nb tended to form stable carbides, which might remain in the final product even after decarburization annealing, and could deteriorate the final magnetic properties. Wang [21] reported that Nb (C, N) had an overwhelming number of density and grain pinning effects, as secondary recrystallization did not proceed in Nb-bearing grain-oriented silicon steel, and the overmuch {113} <110> texture prevented the growing of Goss texture.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Precipitates and Texture Evolution in Nb-Bearing Grain-Oriented Silicon Steel Produced by Conventional Processing and Novel Twin-Roll Casting

Wang

Zhang

Fang

et al. 2020

Metals

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The Nb-bearing grain-oriented silicon steel sheets were produced by conventional route and novel twin-roll casting route, respectively. The microstructure, texture and precipitate evolution were comparatively investigated by using electron backscattered diffraction (EBSD) and transmission electron microscope (TEM). The findings revealed that the precipitation behavior and the texture evolution were totally different between the two processing routes. In the conventional route, a great number of nanoscale niobium nitride particles (NbN), which acted as mainly grain growth inhibitors were precipitated during hot rolling, while in the twin-roll casting route, due to the rapid solidification, the precipitation of NbN were suppressed and a new type Nb-bearing precipitate enriched with sulfur element was observed in the as-cast strip. Besides, the primary recrystallized texture of conventional specimens was characterized by strong γ-fiber with a peak at {111} <110>, together with very few Goss components. While in the case of twin-roll casting specimens, the strongest primary recrystallized texture was {111} <112> texture and the area fraction of Goss component was much higher than that of conventional specimens. After final high temperature annealing, complete secondary recrystallization was obtained in twin-roll casting specimens and the magnetic induction of B8 was 0.1 T higher than that of conventional specimens.

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“…[12,13] Therefore, strip casting is a very promising method for the production of silicon steel strip, especially for the high-silicon steels. [14,15] Although the commercial production of high-silicon steel strip through twin-roll casting technique was hardly reported, the pilot twinroll caster has been applied to investigate the microstructure evolution of high-silicon steel strips during the strip-casting process. For example, Lu et al [15] produced a grain-oriented 6.5 wt pct Si steel strip by a pilot twin-roll caster, and found that fine equiaxed grains with random texture could be obtained under a relatively low melt superheat.…”

Section: Introductionmentioning

confidence: 99%

Formation of Deposited Oxide Film during the Sub-rapid Solidification of Silicon Steel Droplet and Its Effect on Interfacial Heat Transfer Behavior

Wang

Cai

et al. 2021

Metall Mater Trans B

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The droplet solidification technique was used to investigate the formation of deposited film and the interfacial heat transfer for the sub-rapid solidification of silicon steels. The composition of deposited films consists of MnO, FeO and SiO 2 for both the low and high-silicon steels. The deposited film could improve the wetting condition between the steel droplet and substrate. And the wetting condition between the droplet and substrate improves with the increasing of ejection times from 1 to 9, and thus the final contact angles decrease gradually from 105.1 to 72.8 deg. The peak value of heat flux increases with the number of solidification tests, indicating that the heat transfer condition between the droplet and substrate improves with the deposition of film. The peak value of heat flux increases from 5.64 to 7.42 MW/m 2 for low-silicon steel after the 9th ejection, and it is from 6.03 to 9.06 MW/m 2 for high-silicon steel. This is because the interfacial thermal resistance between the droplet and substrate reduces gradually with the increasing of test times. A higher Mn content in the high-silicon steel leads to a higher deposited rate of the oxide film than the low-silicon steel. Compared with the low-silicon steel, the increment of MnO content in the film for the high-silicon steel is 6.60 wt pct, and there is no obvious increment of SiO 2 in the film, though the increment of Si in high-silicon steel is 6.06 wt pct, and for Mn is only 0.72 wt pct.

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Evolution of microstructure and texture in grain-oriented 6.5%Si steel processed by strip-casting

Cited by 34 publications

References 26 publications

On the through-process texture evolution assessment in grain oriented Fe-3 wt% Si steel produced by a novel directional inoculation technique

On the through-process texture evolution assessment in grain oriented Fe-3 wt% Si steel produced by a novel directional inoculation technique

Comparison of Precipitates and Texture Evolution in Nb-Bearing Grain-Oriented Silicon Steel Produced by Conventional Processing and Novel Twin-Roll Casting

Formation of Deposited Oxide Film during the Sub-rapid Solidification of Silicon Steel Droplet and Its Effect on Interfacial Heat Transfer Behavior

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