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<p>In order to improve the strength, ductility, and toughness, tempforming was used to fabricate very fine fibrous-grained steels by warm caliber rolling technology, with the specific average grain size being about 0.1 ~ 4&#xa0;μm. Herein, the addition of Cr element to the 20 carbon steel can effectively refine the size of very fine fibrous grains and nanoscale carbides, as well as strengthen the &lt; 110 &gt; rolling texture intensity and dislocation density, realizing the strengthening–toughening aim at high rolling reduction ratio. Moreover, the addition of Cr element can improve the peak impact toughness from 162 to 320&#xa0;J/cm<sup>2</sup>, which is mainly attributed to the microstructural stability and delamination sensitivity during the tempforming process.</p>

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Effect of Element Cr on the Microstructure and Mechanical Properties of Very Fine Fibrous Grained Steels

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • Zhixia Xiao,
  • Mengkai Xu,
  • BaoXi Liu,
  • Yulong Gao,
  • Jianhang Feng,
  • FuXing Yin

摘要

In order to improve the strength, ductility, and toughness, tempforming was used to fabricate very fine fibrous-grained steels by warm caliber rolling technology, with the specific average grain size being about 0.1 ~ 4 μm. Herein, the addition of Cr element to the 20 carbon steel can effectively refine the size of very fine fibrous grains and nanoscale carbides, as well as strengthen the < 110 > rolling texture intensity and dislocation density, realizing the strengthening–toughening aim at high rolling reduction ratio. Moreover, the addition of Cr element can improve the peak impact toughness from 162 to 320 J/cm2, which is mainly attributed to the microstructural stability and delamination sensitivity during the tempforming process.