Effect of magnetic field applied during laser-arc hybrid welding in improving the pitting resistance of the welded zone in austenitic stainless steel

被引:38
作者
Chen, Rong [1 ]
Jiang, Ping [1 ]
Shao, Xinyu [1 ]
Mi, Gaoyang [2 ]
Wang, Chunming [2 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Hubei, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
304; stainless; delta-Ferrite; Magnetic field; Welding; Pitting corrosion; Texture; MECHANICAL-PROPERTIES; SOLIDIFICATION MODE; CORROSION BEHAVIOR; MICROSTRUCTURE; FERRITE; TEMPERATURE; TEXTURE; PHASE; METAL; JOINT;
D O I
10.1016/j.corsci.2017.07.019
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Pitting corrosion resistance of austenitic stainless steel welded zone is improved with an external magnetic field applied during laser-arc hybrid welding. Analysis of the microstructure indicates that welding with an external magnetic field homogenizes distribution of delta-ferrite in austenite matrix by weakening delta-ferrite texture intensity and promoting growth of uniform skeletal morphology. The improved pitting corrosion resistance is characterized by a higher pitting potential with smaller passivation current density, which is attributed to the uniform Cr diffusion resulting from homogeneous distribution of delta-ferrite.
引用
收藏
页码:385 / 391
页数:7
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