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<p>This study was aimed to arrest the formation of undesirable hard phases in the heat-affected zone (HAZ) of AISI 9840 carbon steel by using magnetic fields of low intensity (4.3&#xa0;mT) during submerged arc welding. Microstructural observation by optical and scanning electron microscopy&#xa0;of the welded joints revealed that the plates welded with magnetic field presented restriction in the formation of bainite in the HAZ and the martensite formed exhibited a thicker structure. Microhardness profiles showed that the application of magnetic field during welding reduced the hardness in the welded joint by 209 Vickers units&#xa0;at maximum peaks and the dispersion of the data indicated a reduction of approximately 41% in the range graph.</p> Graphical abstract <p></p>

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Phase reduction in the heat-affected zone of Ni-Cr-Mo steel welded by the submerged arc welding process with electromagnetic interaction of low intensity

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • M. C. Ramírez,
  • V. H. López-Morelos,
  • J. C. Verduzco-Juárez,
  • Rafael García Hernández,
  • F. F. Curiel

摘要

This study was aimed to arrest the formation of undesirable hard phases in the heat-affected zone (HAZ) of AISI 9840 carbon steel by using magnetic fields of low intensity (4.3 mT) during submerged arc welding. Microstructural observation by optical and scanning electron microscopy of the welded joints revealed that the plates welded with magnetic field presented restriction in the formation of bainite in the HAZ and the martensite formed exhibited a thicker structure. Microhardness profiles showed that the application of magnetic field during welding reduced the hardness in the welded joint by 209 Vickers units at maximum peaks and the dispersion of the data indicated a reduction of approximately 41% in the range graph.

Graphical abstract