柱状晶组织高硅电工钢二次再结晶的形成机理

doi:DOI：10.13228/j.boyuan.issn0449-749x.20180360

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Abstract Secondary recrystallization would remarkably change the microstructure and texture of electrical steel，which further influenced its magnetic properties. The microstructure and texture of cold-rolled columnar-grained high silicon electrical steel were investigated by multiple annealing methods. The occurrence conditions，formation reason and control methods of secondary recrystallization were clarified. The results showed that the temperature of secondary recrystallization was ranged between 850～1 000 ℃. The maximum grain size was obtained in the sample annealed at 900 ℃. The reason for secondary recrystallization was determined to be texture inhibition of initial recrystallization. The normal grain growth was inhibited by low-angle grain boundaries，while the grains with high-angle grain boundaries occurred secondary recrystallization by oriented growth due to high energy （HE） and high grain boundary mobility. When the annealing temperature was higher than 1 000 ℃， the secondary recrystallization could be restrained by increasing heating and cooling rates higher than 5 ℃/min.

Key words： high silicon electrical steel secondary recrystallization annealing

Received: 25 September 2018 Published: 09 May 2019

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http://www.chinamet.cn/Jweb_gt/EN/DOI：10.13228/j.boyuan.issn0449-749x.20180360 OR http://www.chinamet.cn/Jweb_gt/EN/Y2019/V54/I5/47

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