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<p>This article reviews the effects of dual-pulse spot welding (DSW) on the microstructure of welds, mechanical properties, and crack characteristics during the in-situ post-heating process, elucidating the mechanisms underlying these effects. The research findings indicate that dual-pulse welding change the microstructure of the fusion zone, modifies the grain size in the heat-affected zone, improves the fatigue resistance of weld points, and effectively reduces both the number and density of cracks. Additionally, it controls crack propagation, thereby decreasing crack length, minimizing welding defects, and enhancing the overall quality of the welded joints. These improvements are crucial for enhancing the safety and durability of welded structures.</p>

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Enhancing the Performance of Resistance Spot Welding (RSW) Through in-situ Heating and Welded Joints Quality: Overview

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Qingwei Liu,
  • Zuhong Lu,
  • Xi Huang,
  • Hui Wang

摘要

This article reviews the effects of dual-pulse spot welding (DSW) on the microstructure of welds, mechanical properties, and crack characteristics during the in-situ post-heating process, elucidating the mechanisms underlying these effects. The research findings indicate that dual-pulse welding change the microstructure of the fusion zone, modifies the grain size in the heat-affected zone, improves the fatigue resistance of weld points, and effectively reduces both the number and density of cracks. Additionally, it controls crack propagation, thereby decreasing crack length, minimizing welding defects, and enhancing the overall quality of the welded joints. These improvements are crucial for enhancing the safety and durability of welded structures.