薄板坯连铸连轧流程制备低温Hi-B钢织构的演变及Goss晶粒的发展

doi:10.11896/cldb.20120130

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Abstract Based on low-temperature high permeability grain-oriented silicon steel produced by thin slab casting and rolling process with simultaneous decarburization and nitriding, the evolution characteristics of the main texture components and their area fractions and distribution were studied by means of EBSD and XRD. The development of Goss grains with relatively accurate orientation along the processing route was also investigated. It is found that the texture components of hot-rolled band and normalized band are mainly α fiber textures from {001}〈110〉 to {112}〈110〉, and the texture distribution is inhomogeneous along the thickness direction. Moreover, the Goss grains within 5° misorientation against the stan-dard {110}〈001〉 are basically located at 1/10—1/4 of the entire band thickness, and the area fraction is only about 0.1%. The texture components of cold-rolled sheet are still mainly α fiber textures from {001}〈110〉 to {223}〈110〉, but the intensities are enhanced significantly. After simutaneous decarburization and nitriding treatment at 835 ℃, the intensities and area fractions of {001}〈120〉, {114}〈481〉 and {110}〈001〉 textures in the nitrided sheet are increased obviously, while the α fiber textures are the opposite. However, the distribution position and area fraction of the Goss grains within 5° misorientation are basically unchanged. Furthermore, compared with other specified orientation grains within 10° misorientation in the nitrided sheet, the Goss grains are not dominant in size, area fraction and proportion of Σ3—Σ9 grain boundaries, but have extremely obvious advantage in the proportion of high energy grain boundaries, which means, in the initial stage of secondary recrystallization of Goss grains, the high energy grain boundaries may play the more critical role. After secondary recrystallization annealing, the final product with excellent magnetic properties is mainly a sharp Goss texture. And the misorientation angle is about 3° against the standard {110}〈001〉.

Key words： high permeability grain-oriented silicon steel thin slab simutaneous decarburization and nitriding texture Goss grain high energy grain boundary

Published: 10 May 2022 Online: 2022-05-09

CLC number:

TG142.77

Fund:National Key R & D Program of China (2016YFB0300305).

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	FU Bing
	XIANG Li
	QIAO Jialong
	LIU Jing
	QIU Shengtao

Cite this article:

FU Bing,XIANG Li,QIAO Jialong, et al. Evolution of Texture and Development of Goss Grains in High Permeability Grain Oriented Silicon Steel Produced by TSCR Process[J]. Materials Reports, 2022, 36(9): 20120130-8.

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http://www.mater-rep.com/EN/10.11896/cldb.20120130 OR http://www.mater-rep.com/EN/Y2022/V36/I9/20120130

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