Abstract
The Al-Si coating was negative to the laser welding of press-hardened steel (PHS). This study carried out the comparative analysis of the shielding gas (Pure Ar and CO2 shielding gas) on the surface formation of welded seam. The results showed that the intermittent umbrella-shaped Fe-Al intermetallic compounds (IMCs) on both sides of the weld were presented for the Ar shielding gas, but it was disappeared for CO2 shielding gas. The adjacent Al-Si coating on the humps of the molten pool was melted by the heat conduction of the liquid metal, and flowed into the molten pool at the gap of two humps. The reaction between Fe and Al occurred to form Fe-Al IMCs as umbrella-shaped. The CO2 shielding gas provided a reaction opportunity with liquid Al to form the floated film on the surface of molten pool due to low Gibbs free energy, which presented particles oxides on the weld surface after solidification.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
