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<p>The regulatory effect of normalizing on the microstructure of grain-oriented pure iron was investigated by using OM, EBSD, and magnetic property measuring instruments. The research results show that, after the normalizing treatment of grain-oriented pure iron, the grain size distribution of the samples along the thickness direction showed significant differences. Among them, the surface grains of the grain-oriented pure iron samples treated at 900°C for 5 min were relatively fine, while the grain sizes of the subsurface layer and the central layer gradually increased. The grain sizes of the surface layer, subsurface layer, and central layer were 22.7&#xa0;<i>μ</i>m, 25.1&#xa0;<i>μ</i>m, and 27.8&#xa0;<i>μ</i>m, respectively. The proportion of {112}&lt;111&gt; and {114}&lt; 481&gt; textures in the surface layer of the normalized sample is relatively high, while the proportion of {110}&lt;001&gt;, {114}&lt;481&gt;, and {100}&lt; 110&gt; textures in the subsurface layer has increased. The proportions of {100}&lt;110&gt;, {110}&lt;001&gt;, {110}&lt;112&gt;, and {112}&lt; 111&gt; in the central layer have increased. The magnetic properties of grain-oriented pure iron treated by different normalizing processes vary significantly after annealing due to different degrees of secondary recrystallization. Among them, the grain-oriented pure iron samples after 900℃ × 5&#xa0;min normalizing treatment have a relatively high B<sub>800</sub> value of 1.955&#xa0;T and a B<sub>10000</sub> value of 2.263&#xa0;T after annealing. The iron loss is relatively low, with P<sub>17/50</sub> being 2.766&#xa0;W/kg, while the low-frequency iron loss is even better, with P<sub>17/10</sub> being only 0.307&#xa0;W/kg and P<sub>17/15</sub> being only 0.514&#xa0;W/kg.</p>

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Research on the Controlling Mechanism of Normalizing on the Microstructure of Grain-Oriented Pure Iron

  • 期刊论文

  • 发表日期：

    2026年5月1日

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  • Luan Shen-teng,
  • Wang Hai-jun,
  • Qiao Jia-long,
  • Qiu Sheng-tao

摘要

The regulatory effect of normalizing on the microstructure of grain-oriented pure iron was investigated by using OM, EBSD, and magnetic property measuring instruments. The research results show that, after the normalizing treatment of grain-oriented pure iron, the grain size distribution of the samples along the thickness direction showed significant differences. Among them, the surface grains of the grain-oriented pure iron samples treated at 900°C for 5 min were relatively fine, while the grain sizes of the subsurface layer and the central layer gradually increased. The grain sizes of the surface layer, subsurface layer, and central layer were 22.7 μm, 25.1 μm, and 27.8 μm, respectively. The proportion of {112}<111> and {114}< 481> textures in the surface layer of the normalized sample is relatively high, while the proportion of {110}<001>, {114}<481>, and {100}< 110> textures in the subsurface layer has increased. The proportions of {100}<110>, {110}<001>, {110}<112>, and {112}< 111> in the central layer have increased. The magnetic properties of grain-oriented pure iron treated by different normalizing processes vary significantly after annealing due to different degrees of secondary recrystallization. Among them, the grain-oriented pure iron samples after 900℃ × 5 min normalizing treatment have a relatively high B800 value of 1.955 T and a B10000 value of 2.263 T after annealing. The iron loss is relatively low, with P17/50 being 2.766 W/kg, while the low-frequency iron loss is even better, with P17/10 being only 0.307 W/kg and P17/15 being only 0.514 W/kg.