Scholarlink

<p>Adding 0.175 wt.% Nb to improve the service life of medium-carbon low-alloy steel, and the microstructure, mechanical properties and abrasion resistance are systematically studied. The results showed that fine and dispersed (Nb,Ti)C carbides formed in the steel after the Nb addition, and the average width of matrix lath decreased from 71.3 to 28.1&#xa0;nm. The hardness, impact absorption energy and tensile strength of the steel were increased to 56.5 HRC, 7.1&#xa0;J and 1960.9&#xa0;MPa, respectively. Moreover, the second phase strengthening and refining strengthening caused by the Nb addition facilitate abrasion resistance of the steel increasing by 7.9%. Accordingly, it has been proven that abrasion resistance of the medium-carbon low-alloy steel reaches the American ZG50Ni2Si2CrMo steel, which is conducive to the development of medium-carbon low-alloy steel.</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

The Influence of Nb Addition on the Microstructure, Mechanical Properties and Abrasion Resistance of Medium-Carbon Low-Alloy Steel

  • 期刊论文

  • 发表日期：

    2025年3月14日

查看全文
  • Wang Chaozhong,
  • Lei Naiyi,
  • Ping Xianzhong,
  • Li Wei,
  • Yi Yanliang

摘要

Adding 0.175 wt.% Nb to improve the service life of medium-carbon low-alloy steel, and the microstructure, mechanical properties and abrasion resistance are systematically studied. The results showed that fine and dispersed (Nb,Ti)C carbides formed in the steel after the Nb addition, and the average width of matrix lath decreased from 71.3 to 28.1 nm. The hardness, impact absorption energy and tensile strength of the steel were increased to 56.5 HRC, 7.1 J and 1960.9 MPa, respectively. Moreover, the second phase strengthening and refining strengthening caused by the Nb addition facilitate abrasion resistance of the steel increasing by 7.9%. Accordingly, it has been proven that abrasion resistance of the medium-carbon low-alloy steel reaches the American ZG50Ni2Si2CrMo steel, which is conducive to the development of medium-carbon low-alloy steel.