电焊机2026，Vol.56Issue(1)：74-80,7.DOI:10.7512/j.issn.1001-2303.2026.01.10
Mn元素含量对大线能量EH36钢焊接接头耐腐蚀性能的影响
The Influence of Mn Content on the Corrosion Resistance of High Heat Input EH36 Steel Welded Joints
摘要
Abstract
This study conducted high heat input welding experiments on marine engineering EH36 high-strength steel,inves-tigating the microstructural characteristics and seawater corrosion resistance of welded joints under different flux-cored wire compositions.By adjusting the Mn element content in flux-cored wires,the seawater corrosion resistance of EH36 steel welded joints under high heat input welding was optimized.The research employed EH36 high-strength steel as the base ma-terial and used self-developed flux-cored wires.By varying the Mn-Fe content in the flux-cored wires(4.137%-12.470%),welding samples with different Mn contents(M1～M5)were prepared.The results showed that different Mn contents led to variations in the microstructure of welded joints.The M5 sample(12.47%Mn-Fe content)exhibited more uniform and finer grain structure,with the welded joint hardness meeting national standard requirements and demonstrating good organiza-tional uniformity.When the Mn-Fe content is 12.47%,the impact toughness of the welded joint is the best at room tempera-ture(20℃),reaching 50.81 J/cm².At this point,the EH36 steel joint exhibits the best corrosion resistance performance.关键词
EH36钢/大线能量焊接/微观组织/海水腐蚀Key words
EH36 steel/high heat input welding/microstructure/seawater corrosion分类
矿业与冶金引用本文复制引用
张凯,邓集辉,余陈,张宇鹏,邹晓东,王海燕..Mn元素含量对大线能量EH36钢焊接接头耐腐蚀性能的影响[J].电焊机,2026,56(1):74-80,7.基金项目
广东省海洋经济发展(海洋六大产业)专项资金项目(粤自然资合[2024]24号) （海洋六大产业）
