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Numerical and experimental investigation of vacuum-assisted laser welding for DP590 galvanized steel lap joint without prescribed gap

International Journal of Advanced Manufacturing Technology, ISSN: 1433-3015, Vol: 94, Issue: 9-12, Page: 4177-4185
2018
  • 13
    Citations
  • 0
    Usage
  • 8
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    13
    • Citation Indexes
      13
  • Captures
    8

Article Description

The high-pressurized zinc vapor, which was developed at the interface of the two metal sheets due to the lower boiling point of zinc (around 906 °C) than the melting point of steel (over 1500 °C), led to the formation of macro-blowholes. Vacuum-assisted laser welding was a powerful approach to obtain a defect-free weld bead. The laser welding process was simulated to observe the dynamic or zinc vapor. The stability of laser welding was analyzed according to simulated results. The zinc distribution which was measured by EDS experiment also represented the influence of ambient pressure on welding stability. The bearing load for weld beads under different ambient pressure was measured by shear strength test. A defect-free continuous laser weld bead could be obtained under 3 kPa ambient pressure.

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