Recent Trends to Improve Laser Weldability of Al-Si coated Hot-stamped Boron Steel

• DOI: 10.5781/jwj.2022.40.2.9
• Publication Date: 2022-04-15T06:57:51Z
• Authors: Hyunuk Jun; Changwook Ji
• Keywords: Weldability; Fusion welding; Hot stamping; Decarburization

The current demand for vehicles with high fuel efficiency, which has improved their safety, as well enhanced crash worthiness qualities is being met by the use of high-strength components fabricated via hot stamping process. Most Al-Si coated layer applied to prevent oxidation and decarburization caused this During laser welding, diluted in fusion zone segregation, ferrite formed some areas, causing deterioration mechanical properties. In paper, we provide a comprehensive review weldability improvement Al-Si-coated boron steel from various aspects. Three main solutions have been form full austenitization zone; removing layer, inducing strong austenite stabilizers, introducing new welding process such arc pre-treatment, dual-beam oscillation welding.