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

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1085
Author(s):  
Yang Wang ◽  
Yuanxiang Zhang ◽  
Feng Fang ◽  
Xiang Lu ◽  
Guo Yuan ◽  
...  
Keyword(s):  
Texture Evolution ◽  
Secondary Recrystallization ◽  
Niobium Nitride ◽  
Silicon Steel ◽  
Electron Backscattered Diffraction ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Transmission Electron ◽  
New Type ◽  
Twin Roll

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.

Texture Evolution in Non-Oriented Silicon Steel Processed by Twin-Roll Casting

2012 ◽  
Vol 452-453 ◽  
pp. 7-11 ◽  
Author(s):  
Wei Pei ◽  
Yu Hui Sha ◽  
Fang Zhang ◽  
Liang Zuo
Keyword(s):  
Cold Rolling ◽  
Texture Evolution ◽  
Casting Process ◽  
Rolling Process ◽  
Silicon Steel ◽  
Recrystallization Annealing ◽  
Twin Roll Casting ◽  
Steel Sheets ◽  
Roll Casting ◽  
Twin Roll

In this paper, non-silicon steel sheets were produced by both twin-roll casting method and conventional process. Orientation characteristics and texture evolution of the sheets during casting, cold rolling and recrystallization annealing were investigated for comparison. It was found that the subsurface of twin-roll casting strips are characterized by weak {100} orientation while the central layer by random orientation. Twin-roll casting process can decrease α fiber (//RD) and increase γ fiber (//ND) during cold rolling process. Consequently, the η fiber (//RD) favorable for magnetic properties of non-silicon steels is enhanced and the detrimental {111} component is suppressed after annealing.

Texture Evolution in Non-Oriented Silicon Steel Processed by Twin-Roll Casting

2012 ◽  
Vol 452-453 ◽  
pp. 7-11
Author(s):  
Wei Pei ◽  
Yu Hui Sha ◽  
Fang Zhang ◽  
Liang Zuo
Keyword(s):  
Texture Evolution ◽  
Silicon Steel ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Influence Research of Al and Zn Addition for Twin Roll Casting Magnesium During Multi-Pass Hot Rolling

2020 ◽  
Vol 12 (5) ◽  
pp. 685-692 ◽  
Author(s):  
Jia Yao ◽  
Min Zha ◽  
Huiyuan Wang ◽  
Wei Lu
Keyword(s):  
Hot Rolling ◽  
Texture Evolution ◽  
Az31 Alloy ◽  
Thickness Reduction ◽  
Twin Roll Casting ◽  
Texture Intensity ◽  
Pinning Effect ◽  
Roll Casting ◽  
Zn Addition ◽  
Twin Roll

This study was aimed at revealing the influence of Al and Zn additions on microstructure, texture evolution and mechanical properties of twin roll casting Mg during multi-pass hot rolling. Firstly, both pure Mg and AZ31 sheets were rolled 9 passes with ∼80% thickness reduction. More effective grain refinement in AZ31 compared to pure Mg after hot rolling, which caused by the pinning effect from fine Mg17Al12 particles present in AZ31 alloy. Meanwhile a strong basal texture gradually formed with increasing thickness reduction in pure Mg. With Al and Zn adding, the texture intensity of AZ31 was much lower than pure Mg in each rolling-pass. The 5th AZ31 sample features a maximum intensity of ∼12.9, which is reduced by 50.6% as compared to the value of ∼26.1 for pure Mg. Compared to pure Mg, the Al and Zn solutes and weakened texture in AZ31 favor the strong work hardening, which promotes a simultaneous high ultimate tensile strength of ∼270 MPa and ductility of ∼22% in the 5th AZ31 sample. The results will be helpful for the TRCed Mg alloys with huge potential for industrial application.

scholarly journals Microstructure and Texture Evolution during Twin-Roll Casting and Annealing of a Mg–6.8Y2.5Zn–0.4Zr Alloy (WZ73)

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 513 ◽  
Author(s):  
Kristina Kittner ◽  
Madlen Ullmann ◽  
Falko Arndt ◽  
Rudolf Kawalla ◽  
Ulrich Prahl
Keyword(s):  
Grain Boundaries ◽  
High Temperatures ◽  
Texture Evolution ◽  
Cast State ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Average Grain Size ◽  
Different Temperatures ◽  
Twin Roll Cast ◽  
Twin Roll

In the present work, the microstructure and texture of a Mg–6.8Y–2.5Zn–0.4Zr sheet manufactured by twin-roll casting were investigated. The twin-roll cast state consisted of two apparent phases: the α-Mg matrix, which was made up of dobulites with an average grain size of approximately 50 µm and the LPSO (long-period stacking ordered) phase, which formed network-like precipitates along the grain boundaries. After twin-roll casting, annealing was carried out under conditions of different temperatures ranging from 450 °C to 525 °C and holding times between 2 h and 24 h. It was found that heat treatment led to the formation of a microstructure in which grains were apparent. Furthermore, it could be observed that high temperatures > 500 °C led to changes in the morphology of the LPSO structures. On one hand, the network-like structure dissolved while, on the other hand, both rodlike and blocky LPSO phases precipitated predominantly at the grain boundaries of the α-Mg matrix. This process was fostered by high temperatures and long holding times.

Aging Effect on Texture Evolution during Warm Rolling of ZK60 Alloys Fabricated by Twin-Roll Casting

2010 ◽  
Vol 41 (10) ◽  
pp. 2575-2583 ◽  
Author(s):  
Jae-Hyung Cho ◽  
Hong-Mei Chen ◽  
Shi-Hoon Choi ◽  
Hyoung-Wook Kim ◽  
Suk-Bong Kang
Keyword(s):  
Texture Evolution ◽  
Aging Effect ◽  
Warm Rolling ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Effect of electric current pulse on solidification of silicon steel pertinent to twin roll casting

2011 ◽  
Vol 38 (5) ◽  
pp. 374-378
Author(s):  
X Y He ◽  
Q Z Sun ◽  
L Wang ◽  
Q Peng ◽  
C J Song ◽  
...  
Keyword(s):  
Electric Current ◽  
Current Pulse ◽  
Silicon Steel ◽  
Electric Current Pulse ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Microstructure Analysis and Bulk Texture Study in Wide Magnesium Alloy Sheets Processed by Twin-Roll Casting

2021 ◽  
Vol 13 (9) ◽  
pp. 1771-1780
Author(s):  
Yu-Qing Li ◽  
Tong Wang ◽  
Yun-Tao Liu ◽  
Dong-Feng Chen ◽  
Kai Sun ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Alloy Composition ◽  
Texture Evolution ◽  
Mg Alloy ◽  
Basal Texture ◽  
Twin Roll Casting ◽  
Electron Backscattering Diffraction ◽  
Roll Casting ◽  
Twin Roll ◽  
Zn Alloy

The wide magnesium (Mg) alloy sheets produced by twin-roll casting (TRC) are prone to have an inhomogeneous microstructure and basal texture. Texture has a significant effect on the properties of Mg alloy sheets for the processes after TRC, which can be greatly modified by alloy composition. However, systematic studies on the bulk texture of TRCed Mg alloy sheets using neutron diffraction are lacking. In this study, neutron diffraction was used to explore the bulk textures in different positions of the Mg, Mg–Al–Zn, and Mg–Al–Sn–Zn alloy sheets produced by TRC, besides microstructure and micro-texture analysis using field emission scanning electron microscopy and electron backscattering diffraction. The influence of alloy composition on the microstructure and texture evolution of TRCed Mg alloy sheets is explored and discussed. The TRCed pure Mg sheet possesses a relatively strong basal texture, and the texture distribution is inhomogeneous; while TRCed Mg–Al–Sn–Zn alloy sheets feature much weaker textures and a relatively homogenous distribution in different positions. The present study provides guidance for the control of texture via tailoring alloy compositions, which provides candidate Mg alloys suitable for the TRC process.

Effect of annealing after strip casting on texture development in grain oriented silicon steel produced by twin roll casting

2015 ◽  
Vol 107 ◽  
pp. 79-84 ◽  
Author(s):  
Yang Wang ◽  
Yun-Bo Xu ◽  
Yuan-Xiang Zhang ◽  
Feng Fang ◽  
Xiang Lu ◽  
...  
Keyword(s):  
Silicon Steel ◽  
Strip Casting ◽  
Texture Development ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll

Strong cube recrystallization texture in silicon steel by twin-roll casting process

2014 ◽  
Vol 76 ◽  
pp. 106-117 ◽  
Author(s):  
Y.H. Sha ◽  
C. Sun ◽  
F. Zhang ◽  
D. Patel ◽  
X. Chen ◽  
...  
Keyword(s):  
Recrystallization Texture ◽  
Casting Process ◽  
Silicon Steel ◽  
Twin Roll Casting ◽  
Roll Casting ◽  
Twin Roll
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