Study of laser butt welding of SUS301L stainless steel and welding joint analysis

• Published in: International journal of advanced manufacturing technology Vol. 73; no. 9-12; pp. 1695 - 1704
• Main Authors: Chen, Long, Zhou, Longzao, Tang, Chao, Huang, Wei, Wang, Chunming, Hu, Xiyuan, Wang, Jun, Yan, Fei, Wang, Xuefang, Jiang, Zhengguang, Shao, Xinyu
• Format: Journal Article
• Language: English
• Published: London Springer London 01.08.2014; Springer Nature B.V
• Subjects: Butt joints; Butt welding; CAE) and Design; Computer-Aided Engineering (CAD; Corrosion fatigue; Corrosion resistance; Corrosion tests; Electrolytic etching; Engineering; Fatigue limit; Fatigue tests; Industrial and Production Engineering; Intergranular corrosion; Laser beam welding; Lasers; Mechanical Engineering; Media Management; Metal fatigue; Metallurgy; Morphology; Optical microscopy; Original Article; Process parameters; Stainless steel; Stainless steels; Welded joints; Fatigue property; Laser welding; Stainless steel; Intergranular corrosion
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-014-5928-y

This paper describes a study on laser butt welding of 4 and 2 mm SUS301L stainless steel and a detailed analysis of welding joints. The gap tolerance of butt joint was also studied with optimized process parameters. The electrolytic etching in 10 % oxalate solution was used to test the intergranular corrosion of the 4 mm SUS301L welded joint. Fatigue property of the 2 mm SUS301L welded joint was tested under the conditional cycle times of 1 × 10 7 . Using optical microscopy, the changes of metallurgical microstructure in the weld zone of 4 mm SUS301L were also studied. It has been found that laser butt welding of 4 mm SUS301L is able to achieve sound metallurgical morphology and high strength weld joint when the butt gap is within certain tolerance. The weld joint also has good resistance to intergranular corrosion and has a fatigue limit of 310 MPa.