Scholarlink

<p>This study aims to explore the influence of post-weld heat treatment on the mechanical properties and corrosion behavior of 2024 aluminum alloy laser self-melting welded joints. Through hardness tests, tensile tests, static immersion weight loss tests, and electrochemical measurements, combined with microstructure analysis, three situations were studied: AW (unheat-treated welded joints), HT1 (welded joints in a 495&#xa0;°C solution state for 1 h without aging treatment), and HT2 (welded joints in a 495&#xa0;°C solution state for 1 h followed by aging treatment at 190&#xa0;°C for 10 h). Compared with the AW welded joint, the HT2 has a refined structure and increased hardness. The tensile strength of the HT2 welded joint is the greatest, reaching 399&#xa0;MPa. The corrosion resistance of the welded joint after heat treatment can be improved. The corrosion rate of HT2 is 0.0354&#xa0;g&#xa0;mm<sup>−2</sup>&#xa0;h<sup>−1</sup>, which is 16% lower than that of AW. Through electrochemical tests, it is indicated that HT2 forms a more stable passivation layer, effectively preventing and/or delaying corrosion, and has the best corrosion resistance.</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 Post-weld Heat Treatment on the Performance of 2024 Aluminum Alloy Laser Autogenous Welded Joints

  • 期刊论文

  • 发表日期：

    2025年9月12日

查看全文
  • Xiaohong Wang,
  • Anjing Ren,
  • Junjie Lin,
  • Yang Liu,
  • Peiyao Wang,
  • Haoran Tao

摘要

This study aims to explore the influence of post-weld heat treatment on the mechanical properties and corrosion behavior of 2024 aluminum alloy laser self-melting welded joints. Through hardness tests, tensile tests, static immersion weight loss tests, and electrochemical measurements, combined with microstructure analysis, three situations were studied: AW (unheat-treated welded joints), HT1 (welded joints in a 495 °C solution state for 1 h without aging treatment), and HT2 (welded joints in a 495 °C solution state for 1 h followed by aging treatment at 190 °C for 10 h). Compared with the AW welded joint, the HT2 has a refined structure and increased hardness. The tensile strength of the HT2 welded joint is the greatest, reaching 399 MPa. The corrosion resistance of the welded joint after heat treatment can be improved. The corrosion rate of HT2 is 0.0354 g mm−2 h−1, which is 16% lower than that of AW. Through electrochemical tests, it is indicated that HT2 forms a more stable passivation layer, effectively preventing and/or delaying corrosion, and has the best corrosion resistance.