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<p>The aim of this research was to assess the impact of warm and cold rolling on the surface quality, microstructure, texture, and magnetic characteristics of 6.5wt.%Si steel. The results show that the 6.5wt.%Si steel prepared by cold rolling at room temperature has good surface quality, and the 6.5wt.%Si steel prepared by rolling at 300 °C has better processability. After recrystallization annealing of 0.15&#xa0;mm thick 6.5wt.%Si steel, a small recrystallization grain size (61.6&#xa0;μm) was obtained. The γ texture strength of 0.15&#xa0;mm thick 6.5wt.%Si steel warm-rolled sheet is higher than that of 0.15&#xa0;mm thick cold-rolled sheet, no matter the surface layer or the center layer. After recrystallization annealing, γ texture strength in warm-rolled sheet is also higher than that in cold-rolled sheet. The cold-rolled sheet of 0.15&#xa0;mm thick 6.5wt.%Si steel has better comprehensive magnetic properties after annealing, and its magnetic induction intensity B<sub>8</sub>, B<sub>25</sub> and B<sub>50</sub> are 1.30&#xa0;T, 1.42&#xa0;T and 1.61&#xa0;T, respectively. The iron losses of P<sub>10/50</sub>, P<sub>10/400</sub> and P<sub>2/1000</sub> are 0.51 W/kg, 7.23 W/kg and 1.36 W/kg, respectively.</p>

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Influence of Warm and Cold Rolling on Surface Quality, Processability, and Magnetic Properties of 6.5wt.%Si Steel

  • 期刊论文

  • 发表日期：

    2025年2月6日

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  • Dongpo Xuan,
  • Han Guo,
  • Ning Xu,
  • Linshuo Dong,
  • Xuming Liu

摘要

The aim of this research was to assess the impact of warm and cold rolling on the surface quality, microstructure, texture, and magnetic characteristics of 6.5wt.%Si steel. The results show that the 6.5wt.%Si steel prepared by cold rolling at room temperature has good surface quality, and the 6.5wt.%Si steel prepared by rolling at 300 °C has better processability. After recrystallization annealing of 0.15 mm thick 6.5wt.%Si steel, a small recrystallization grain size (61.6 μm) was obtained. The γ texture strength of 0.15 mm thick 6.5wt.%Si steel warm-rolled sheet is higher than that of 0.15 mm thick cold-rolled sheet, no matter the surface layer or the center layer. After recrystallization annealing, γ texture strength in warm-rolled sheet is also higher than that in cold-rolled sheet. The cold-rolled sheet of 0.15 mm thick 6.5wt.%Si steel has better comprehensive magnetic properties after annealing, and its magnetic induction intensity B8, B25 and B50 are 1.30 T, 1.42 T and 1.61 T, respectively. The iron losses of P10/50, P10/400 and P2/1000 are 0.51 W/kg, 7.23 W/kg and 1.36 W/kg, respectively.