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http://dx.doi.org/10.5781/KWJS.2007.25.2.055

Mechanical Properties of the Flash Butt Welded Joint of 590MPa High Strength Steel  

Jeong, Bo-Young (POSCO Technical Research Lab.)
Woo, In-Su (POSCO Technical Research Lab.)
Kim, Jeong-Kil (POSCO Technical Research Lab.)
Lee, Jong-Bong (POSCO Technical Research Lab.)
Publication Information
Journal of Welding and Joining / v.25, no.2, 2007 , pp. 55-61 More about this Journal
Abstract
Flash butt weldability of 590MPa dual phase steel is carried out under micro metallographical examination and macro mechanical property tests. The objective of present study is to investigate the cause that brings on bond line fracture, and is to improve mechanical properties of the flash butt welded joint. The joint of flash butt welding has a superior tensile property, but has bad formability due to oxide formed at bond interface. The HAZ softening in the weld joint does not show. It was found that mechanical properties were increased with optimizing welding parameters and making application of oil dripping and post-weld heat treatment.
Keywords
Flash butt welding; DP steel; Tensile strength; Erichsen test;
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