Scholarlink

<p>Fe-based slag-free self-shielded flux-cored welding wires with different Mn and Al additions were fabricated, and their processing properties and microstructures were studied. The results show that the slag coverage of high-Al and high-Mn wires is 9.03% and 15.32%, respectively. At the current of 260 A and voltage of 27&#xa0;V, a higher deposition rate of 25.06% and lower spatter loss rate of 24.42% are achieved with the high-Al welding wire, as compared with the high-Mn welding wire. The microstructure of the high-Al wire hardfacing alloy is flake ferrite and δ-ferrite, while the microstructure of the high-Mn wire hardfacing alloy is acicular ferrite. Since Al is a ferrite stabilizing element and Mn is an austenite stabilizing element, the addition of Al and Mn is capable of manipulating the type of precipitates by altering the degree of austenitization. Besides, inclusions in the hardfacing alloy may also be potential nucleation sites for acicular ferrite. Due to the better mechanical properties of acicular ferrite, the microhardness of high-Mn hardfacing alloys is higher than that of high-Al alloys.</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

Effects of Mn and Al on property of Fe-based slag-free self-shielded flux-cored welding wire

  • 期刊论文

  • 发表日期：

    2025年3月15日

查看全文
  • Da-shuang Liu,
  • An-zhe Shen,
  • Ping Wei,
  • Jian-hua Xu,
  • Wen-bin Huang,
  • Xiong-hui Li,
  • Jian Qin,
  • Lei Zhang,
  • Wei-min Long,
  • Adrian Wei-Yee Tan,
  • Vasily N. Lednev

摘要

Fe-based slag-free self-shielded flux-cored welding wires with different Mn and Al additions were fabricated, and their processing properties and microstructures were studied. The results show that the slag coverage of high-Al and high-Mn wires is 9.03% and 15.32%, respectively. At the current of 260 A and voltage of 27 V, a higher deposition rate of 25.06% and lower spatter loss rate of 24.42% are achieved with the high-Al welding wire, as compared with the high-Mn welding wire. The microstructure of the high-Al wire hardfacing alloy is flake ferrite and δ-ferrite, while the microstructure of the high-Mn wire hardfacing alloy is acicular ferrite. Since Al is a ferrite stabilizing element and Mn is an austenite stabilizing element, the addition of Al and Mn is capable of manipulating the type of precipitates by altering the degree of austenitization. Besides, inclusions in the hardfacing alloy may also be potential nucleation sites for acicular ferrite. Due to the better mechanical properties of acicular ferrite, the microhardness of high-Mn hardfacing alloys is higher than that of high-Al alloys.