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Steel Fastening Techniques01:17

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Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
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Generating Lap Joints Via Friction Stir Spot Welding on DP780 Steel
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Steel Sheets Laser Lap Joint Welding-Process Analysis.

Hubert Danielewski1, Andrzej Skrzypczyk1

  • 1Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Al. 1000-lecia P.P. 7, 25-314 Kielce, Poland.

Materials (Basel, Switzerland)
|May 20, 2020
PubMed
Summary

This study demonstrates laser beam welding for steel sheets, optimizing parameters via simulation for gas piping. Numerical and experimental results confirm the viability of this deep penetration welding technique.

Keywords:
lap jointslaser weldingmechanical propertiesmicrostructure analysisnumerical simulationsteel sheets

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Area of Science:

  • Materials Science and Engineering
  • Manufacturing Processes
  • Computational Modeling

Background:

  • Laser beam welding offers deep penetration for lap joints.
  • Understanding the thermodynamic mechanism is crucial for optimizing laser welding.
  • Numerical simulation aids in predicting welding parameters and joint properties.

Purpose of the Study:

  • To model and analyze laser lap-joint welding of steel sheets.
  • To estimate optimal welding parameters for gas piping installations.
  • To validate numerical simulations with experimental results.

Main Methods:

  • Utilized Simufact Welding software with Marc solver for thermo-mechanical analysis.
  • Employed surface and conical volumetric heat sources in numerical calculations.
  • Performed experimental welding using a CO2 laser and conducted metallographic analysis.

Main Results:

  • Numerical simulations accurately predicted fusion zone (FZ), heat-affected zone (HAZ), and phase transformations.
  • Estimated welding parameters enabled partial sealed joint penetration.
  • Experimental results for hardness and weld geometry closely matched numerical predictions.

Conclusions:

  • Laser beam welding is a viable technique for steel sheet lap joints.
  • Numerical modeling provides a reliable method for optimizing laser welding processes.
  • The study successfully estimated parameters for gas piping applications.