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
- 2026年56卷第1期 页码:74-80
收稿:2025-05-06,
修回:2025-08-11,
纸质出版:2026-01-20
DOI: 10.7512/j.issn.1001-2303.2026.01.10
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收稿:2025-05-06,
修回:2025-08-11,
纸质出版:2026-01-20
移动端阅览
针对海洋工程用EH36高强钢开展了大线能量焊接试验,研究了不同药芯焊丝成分下EH36钢大线能量焊接接头微观组织特征与耐海水腐蚀性能。通过调整药芯焊丝中Mn元素含量,优化EH36钢大线能量焊接接头耐海水腐蚀性能。研究
选用EH36高强钢为母材,采用自制药芯焊丝,通过改变药芯焊丝中Mn-Fe含量(4.137%~12.470%),制备不同Mn含量的焊接样品(M1~M5)。结果表明:不同Mn含量使焊接接头显微组织呈现差异,M5试样(Mn-Fe含量 12.47%)的晶粒结构更均匀细小,焊接接头的硬度满足国家标准要求,组织均匀性表现良好。当Mn-Fe含量为12.47%时,在室温(20 ℃)条件下焊接接头冲击韧性最好,为66.51 J/cm
2
,此时EH36钢接头表现出最优的耐腐蚀性能。
This study conducted high heat input welding experiments on marine engineering EH36 high-strength steel
investigating 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 material 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 organizational uniformity. When the Mn-Fe content is 12.47%
the impact toughness of the welded joint is the best at room temperature (20℃)
reaching 50.81 J/cm². At this point
the EH36 steel joint exhibits the best corrosion resistance performance.
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