Scholarlink

<p>To elucidate the mechanism by which Thermo-Mechanical Control Processing (TMCP) influences the low-temperature toughness of EH47 low-temperature ship plate steel, a Novel Controlled Rolling and Accelerated Cooling Process (NCR-ACP) was implemented. The microstructure, the size and distribution of precipitated phases, and the morphology of M-A islands at different finishing rolling temperatures were analyzed to investigate the underlying mechanisms contributing to low-temperature toughness. The results indicate that the majority of the precipitated phases are (Nb, Ti)C, which are round or oval in shape. Based on the NCR-ACP process, the final rolling temperature is set between Ar3 and Tnr, and the equivalent grain size is smaller near Ar3, while the M-A islands are finer and dispersed within the bainite ferrite. Through the rapid cooling process and a lower finishing temperature, the equivalent grain size can be effectively reduced and the M-A island distribution pattern can be improved, thereby significantly enhancing the strength and toughness of EH47 steel.</p> Graphical abstract <p></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

Investigation of toughening mechanisms of EH47 steel based on a novel controlled rolling and accelerated cooling process

  • 期刊论文

  • 发表日期：

    2025年1月31日

查看全文
  • Ziqi Wang,
  • Ling Yan,
  • Ziyan Cheng,
  • Jungang Han,
  • Hao Yu

摘要

To elucidate the mechanism by which Thermo-Mechanical Control Processing (TMCP) influences the low-temperature toughness of EH47 low-temperature ship plate steel, a Novel Controlled Rolling and Accelerated Cooling Process (NCR-ACP) was implemented. The microstructure, the size and distribution of precipitated phases, and the morphology of M-A islands at different finishing rolling temperatures were analyzed to investigate the underlying mechanisms contributing to low-temperature toughness. The results indicate that the majority of the precipitated phases are (Nb, Ti)C, which are round or oval in shape. Based on the NCR-ACP process, the final rolling temperature is set between Ar3 and Tnr, and the equivalent grain size is smaller near Ar3, while the M-A islands are finer and dispersed within the bainite ferrite. Through the rapid cooling process and a lower finishing temperature, the equivalent grain size can be effectively reduced and the M-A island distribution pattern can be improved, thereby significantly enhancing the strength and toughness of EH47 steel.

Graphical abstract