Scholarlink

<p>The microstructure and corrosion resistance of hybrid gas tungsten arc welding (GTAW)–gas metal arc welding (GMAW) joints of carbon steel cladded with duplex stainless steel (DDS) were studied and compared with conventional GMAW joints. API 5L X70 steel plates cladded with 3&#xa0;mm of 2209 DSS were welded using both welding processes with an optimized heat input of  ~ 1.4&#xa0;kJ/mm. The microstructure of the weld zone was characterized by optical microscopy to correlate the localized corrosion behavior. Double-loop electrochemical potentiokinetic reactivation (DL-EPR) tests were conducted in 2&#xa0;M H<sub>2</sub>SO<sub>4</sub> + 1&#xa0;M HCl solution to evaluate the intergranular corrosion resistance (IGCR), and electrochemical potentiokinetic polarization (PP) tests were performed to assess the resistance to pitting corrosion (RPC). It was found that the hybrid welding process increased the welding speed by 40% and reduced the heat-affected zone (HAZ) by 25%. The IGCR was improved by up to 300%, whereas the RPC incremented up to twofold in comparison with the conventional GMAW process.</p> Graphical abstract <p></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

Study of GTAW–GMAW hybrid welded plates of API5L X70 steel cladded with 2209 duplex stainless steel

  • 期刊论文

  • 发表日期：

    2025年6月9日

查看全文
  • Violeta Jasivy Campos Hernández,
  • Marco Arturo Garcia-Renteria,
  • Ventura Lilia Cruz-Hernández,
  • Víctor Hugo López-Morelos,
  • Francisco Fernando Curiel-Lopez

摘要

The microstructure and corrosion resistance of hybrid gas tungsten arc welding (GTAW)–gas metal arc welding (GMAW) joints of carbon steel cladded with duplex stainless steel (DDS) were studied and compared with conventional GMAW joints. API 5L X70 steel plates cladded with 3 mm of 2209 DSS were welded using both welding processes with an optimized heat input of  ~ 1.4 kJ/mm. The microstructure of the weld zone was characterized by optical microscopy to correlate the localized corrosion behavior. Double-loop electrochemical potentiokinetic reactivation (DL-EPR) tests were conducted in 2 M H2SO4 + 1 M HCl solution to evaluate the intergranular corrosion resistance (IGCR), and electrochemical potentiokinetic polarization (PP) tests were performed to assess the resistance to pitting corrosion (RPC). It was found that the hybrid welding process increased the welding speed by 40% and reduced the heat-affected zone (HAZ) by 25%. The IGCR was improved by up to 300%, whereas the RPC incremented up to twofold in comparison with the conventional GMAW process.

Graphical abstract