Understanding and elimination of process defects in narrow gap multi-pass fiber laser welding of ferritic steel sheets of 30 mm thickness

• Published in: International journal of advanced manufacturing technology Vol. 88; no. 5-8; pp. 1821 - 1830
• Main Authors: Feng, Jiecai, Guo, Wei, Irvine, Neil, Li, Lin
• Format: Journal Article
• Language: English
• Published: London Springer London 01.02.2017; Springer Nature B.V
• Subjects: Base metal; CAE) and Design; Computer-Aided Engineering (CAD; Defects; Engineering; Ferritic stainless steels; Fiber lasers; Grooves; Heat treating; Industrial and Production Engineering; Joining; Laser beam welding; Lasers; Mechanical Engineering; Media Management; Metal sheets; Microhardness; Original Article; Porosity; Post-weld heat treatment; Thickness; Welded joints; Welding parameters; Narrow gap; Thick-section; Ferritic steel; Laser welding; Multi-pass

Narrow gap (or groove) laser welding involves multiple layer additive manufacture for the joining of thick-section metallic components. Typical defects include porosity, cracking, lack of fusion to sidewalls, and between layers, and component distortion including the closure of the groove. This stud...