Scholarlink

<p>In this study, the high temperature phase transformation behavior of Ce-Nb in synergistic treatment of high-strength spring steel and its influence on cooling microstructure after hot deformation were systematically analyzed. The results show that the continuous slow phase transformation process of Ce<sub>2</sub>O<sub>3</sub>&#xa0;+&#xa0;Ce<sub>2</sub>C<sub>3</sub> → Ce<sub>5</sub>Si<sub>3</sub> → Ce<sub>2</sub>O<sub>3</sub>&#xa0;+&#xa0;CeO<sub>2</sub> related to solid solution Si will occur above 1010&#xa0;°C when the addition of Ce to valve spring steel is 0.0488&#xa0;pct. The higher the temperature is, the more favorable the phase transition process is. Most of the Ce<sub>2</sub>O<sub>3</sub>-Ce<sub>2</sub>C<sub>3</sub> in the steel can be converted into Ce<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub> by holding at 1150&#xa0;°C for 4&#xa0;hours. Three types of nanoscale particles, Ce<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>, NbC and Ce<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>-NbC, will exist in large quantities in the final steel. All tiny particles have a low two-dimensional lattice mismatch with BCC, which can inhibit the growth of austenite, induce martensite nucleation during cooling, and greatly refine the microstructure of steel after hot deformation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

High Temperature Precipitation Behavior of Ce-Nb in Steel and Its Effect on Microstructure After Hot Deformation

  • 期刊论文

  • 发表日期：

    2025年5月2日

查看全文
  • Hao Yang,
  • Haojia Chen,
  • Yang Li,
  • Zhouhua Jiang,
  • Ling Xia,
  • Wenyu Li,
  • Dafang Zhang,
  • Yahang Wang

摘要

In this study, the high temperature phase transformation behavior of Ce-Nb in synergistic treatment of high-strength spring steel and its influence on cooling microstructure after hot deformation were systematically analyzed. The results show that the continuous slow phase transformation process of Ce2O3 + Ce2C3 → Ce5Si3 → Ce2O3 + CeO2 related to solid solution Si will occur above 1010 °C when the addition of Ce to valve spring steel is 0.0488 pct. The higher the temperature is, the more favorable the phase transition process is. Most of the Ce2O3-Ce2C3 in the steel can be converted into Ce2O3-CeO2 by holding at 1150 °C for 4 hours. Three types of nanoscale particles, Ce2O3-CeO2, NbC and Ce2O3-CeO2-NbC, will exist in large quantities in the final steel. All tiny particles have a low two-dimensional lattice mismatch with BCC, which can inhibit the growth of austenite, induce martensite nucleation during cooling, and greatly refine the microstructure of steel after hot deformation.