Scholarlink

<p>Because high-performance special steel often exhibits cold cracking with different welding processes, research on the susceptibility of this steel does not only provide technical support but also enriches its theoretical knowledge. Therefore, the influence of welding currents on the cold cracking sensitivity of high-performance special steel was investigated in this paper by microstructural observation, impact toughness, residual stress, and hardness measurement. The result shows that the microstructure is composed of martensite and retained austenite in the heat-affected zone (HAZ) of the high-performance special steel with various welding currents, the toughness decreased from 23.3 to 20.1&#xa0;J with increasing welding currents (180, 200, 220, and 240&#xa0;A). Simultaneously, the residual stresses increased from 356 to 396&#xa0;MPa, and the cold cracking sensitivity gradually increased with increasing welding currents. When the welding current is increased to 240&#xa0;A, quench-hardening cold cracks appear in the HAZ near the arc crater.</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

Influence of different welding currents on the cold cracking susceptibility of the high-performance special steel

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月25日

查看全文
  • Peiliang Guo,
  • Xinyu Nie,
  • Chunguang Yang,
  • Yonghua Ban,
  • Chang Wang,
  • Hongxia Li,
  • Xinyu Chang,
  • Xiapeng Wang,
  • Qinghua Hao

摘要

Because high-performance special steel often exhibits cold cracking with different welding processes, research on the susceptibility of this steel does not only provide technical support but also enriches its theoretical knowledge. Therefore, the influence of welding currents on the cold cracking sensitivity of high-performance special steel was investigated in this paper by microstructural observation, impact toughness, residual stress, and hardness measurement. The result shows that the microstructure is composed of martensite and retained austenite in the heat-affected zone (HAZ) of the high-performance special steel with various welding currents, the toughness decreased from 23.3 to 20.1 J with increasing welding currents (180, 200, 220, and 240 A). Simultaneously, the residual stresses increased from 356 to 396 MPa, and the cold cracking sensitivity gradually increased with increasing welding currents. When the welding current is increased to 240 A, quench-hardening cold cracks appear in the HAZ near the arc crater.