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<p>Excessive rolling reduction leads to deterioration of magnetic properties, which is a challenge for ultra-thin strips of non-oriented electrical steel. In this work, an ultra-thin strip of Fe-6.5 wt% non-oriented electrical steel with high magnetic induction and low iron loss was prepared by the traditional rolling process. The effects of cold rolling reduction on the microstructure, recrystallization texture, and magnetic properties were investigated in depth. As the reduction increased from 25% to 62.5%, dense shear bands appeared in the deformed {111}&lt;112&gt;, {111}&lt;110&gt;, and {223}&lt;110 &gt; grains. At the initial stage of recrystallization, ample η (&lt; 100&gt;//RD) grains nucleated in {111}&lt;112 &gt; and {111}&lt;110 &gt; shear bands. Additionally, {114}&lt;841 &gt; grains were observed to nucleate in {111}&lt;112 &gt; and {223}&lt;110 &gt; shear bands. Consequently, the sheet T15 developed a strong η-fiber and α*-fiber texture with reduced γ-fiber components. This texture evolution, combined with decreased thickness, significantly improved magnetic properties, as evidenced by low iron loss (P<sub>10/50</sub> = 0.60&#xa0;W/kg, P<sub>10/400</sub> = 8.02&#xa0;W/kg, P<sub>10/800</sub> = 21.46&#xa0;W/kg) and high magnetic induction (B<sub>8</sub> = 1.38 T). These findings demonstrate that optimizing cold rolling reduction effectively enhances the magnetic properties of non-oriented electrical steel through microstructure and texture control.</p>

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High magnetic induction and low iron loss Fe-6.5%Si non-oriented electrical steel fabricated by increasing cold rolling reduction

  • 期刊论文

  • 发表日期：

    2025年11月19日

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  • Zhen Wang,
  • Chaoyu Han,
  • Chenyang Zhang,
  • Binbin Liu,
  • Haoyang Du,
  • Feng Ye

摘要

Excessive rolling reduction leads to deterioration of magnetic properties, which is a challenge for ultra-thin strips of non-oriented electrical steel. In this work, an ultra-thin strip of Fe-6.5 wt% non-oriented electrical steel with high magnetic induction and low iron loss was prepared by the traditional rolling process. The effects of cold rolling reduction on the microstructure, recrystallization texture, and magnetic properties were investigated in depth. As the reduction increased from 25% to 62.5%, dense shear bands appeared in the deformed {111}<112>, {111}<110>, and {223}<110 > grains. At the initial stage of recrystallization, ample η (< 100>//RD) grains nucleated in {111}<112 > and {111}<110 > shear bands. Additionally, {114}<841 > grains were observed to nucleate in {111}<112 > and {223}<110 > shear bands. Consequently, the sheet T15 developed a strong η-fiber and α*-fiber texture with reduced γ-fiber components. This texture evolution, combined with decreased thickness, significantly improved magnetic properties, as evidenced by low iron loss (P10/50 = 0.60 W/kg, P10/400 = 8.02 W/kg, P10/800 = 21.46 W/kg) and high magnetic induction (B8 = 1.38 T). These findings demonstrate that optimizing cold rolling reduction effectively enhances the magnetic properties of non-oriented electrical steel through microstructure and texture control.