The OKB-885 electric roller furnace for secondary annealing of transformer steel

V. I. Filippov

doi:10.1007/bf00655405

The OKB-885 electric roller furnace for secondary annealing of transformer steel

Metal Science and Heat Treatment ◽

10.1007/bf00655405 ◽

1963 ◽

Vol 5 (3) ◽

pp. 166-168

Author(s):

V. I. Filippov

Keyword(s):

Transformer Steel ◽

Electric Roller ◽

Secondary Annealing ◽

Roller Furnace

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Improvement of Mechanical Strength of a Hot-Worked Twinning-Induced Plasticity Steel through an Optimum Secondary Annealing Treatment

Journal of Materials Engineering and Performance ◽

10.1007/s11665-021-05701-8 ◽

2021 ◽

Author(s):

V. García-García ◽

F. Ruiz-León ◽

F. Reyes-Calderón ◽

P. Garnica-González ◽

M. L. Mondragón-Sánchez

Keyword(s):

Mechanical Strength ◽

Annealing Treatment ◽

Secondary Annealing

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The testing of transformer steel

Proceedings of the American Institute of Electrical Engineers ◽

10.1109/paiee.1909.6660057 ◽

1909 ◽

Vol 28 (7) ◽

pp. 1025-1053

Author(s):

M. G. Lloyd ◽

J. V. S. Fisher

Keyword(s):

Transformer Steel

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Parameters of the Hysteresis Model of Transformer Steel Sheets

2018 14th Selected Issues of Electrical Engineering and Electronics (WZEE) ◽

10.1109/wzee.2018.8749055 ◽

2018 ◽

Author(s):

Michal Sierzega ◽

Zbigniew Szular ◽

Witold Mazgaj

Keyword(s):

Transformer Steel ◽

Hysteresis Model ◽

Steel Sheets

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Secondary Recrystallization Behavior in Fe-3%Si Grain-oriented Silicon Steel Produced by Twin-roll Casting and Simplified Secondary Annealing

Metals ◽

10.3390/met10050660 ◽

2020 ◽

Vol 10 (5) ◽

pp. 660

Author(s):

Yang Wang ◽

Yuanxiang Zhang ◽

Feng Fang ◽

Xiang Lu ◽

Guo Yuan ◽

...

Keyword(s):

Laser Scanning ◽

Secondary Recrystallization ◽

Laser Scanning Microscopy ◽

Processing Route ◽

Confocal Laser ◽

Continuous Annealing ◽

Pinning Force ◽

Recrystallization Behavior ◽

Twin Roll ◽

Secondary Annealing

Grain-oriented silicon steels were produced by the shortest processing route involving twin-roll strip casting, two-stage cold rolling with intermediate annealing, and simulated continuous annealing. The secondary recrystallization behavior of grain-oriented silicon steels under different inhibition conditions was in-situ observed by combining the confocal laser scanning microscopy (CLSM) and electron backscattered diffraction (EBSD) techniques. The results revealed that the optimal temperature of secondary recrystallization showed a proportional relationship with the Zenner pinning force. In the case of weak pinning force, the abnormal grain growth occurred quickly at ~1050 °C. The corresponding growth rates were in the range of 60–1400 μm/min and decreased gradually as the secondary recrystallization proceeded. In the case of strong pinning force, the incubation time and onset temperature of the secondary recrystallization was significantly increased, but the total time of the secondary recrystallization was obviously shortened from 685 s to 479 s, and the final magnetic induction of B8 was increased from 1.7 T to 1.85 T. After the secondary annealing, some island grains and coarse primary grains were retained. The formation of island grain was related to the low migration of grain boundaries. The findings of coarse γ- grains indicated that the primary grain size also played a crucial role during secondary recrystallization, apart from the primary recrystallized texture, which attracted more attention previously.

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