Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Amount of Spatter in Arc Welding for High-Strength Galvanized Steel According to Shielding Gas Composition

고강도 아연도금 강판의 아크 용접시 보호가스의 비율에 따른 스패터량에 대한 고찰

  • Jeong, Young-Cheol (Department of Mechanical Engineering, Changwon National University) ;
  • Cho, Young-Tae (Department of Mechanical Engineering, Changwon National University) ;
  • Jung, Yoon-Gyo (Department of Mechanical Engineering, Changwon National University)
  • Received : 2015.10.27
  • Accepted : 2015.12.11
  • Published : 2016.02.29
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Abstract

The need for high-strength galvanized steel has recently increased because of the increased number of car consumers who want improved efficiency and exterior quality. High-strength galvanized steel with high corrosion resistance improves the durability of products and exterior quality. Furthermore, the gilt of zinc does not come off during machining because of the fine adhesive property of zinc. When these are welded, zinc has a lower melting temperature than iron, so zinc is more quickly vaporized than iron. Vaporized zinc can stick to electrodes, which increases spatter in welding transportation. Created spatter can enter the molten pool and develop into inner defects or blowholes and pits. Scattered spatter sticks to the product, which leads to the secondary cost of spatter removal. Therefore, in this study, comparisons of amounts of spatter generated are conducted according to the composition of shielding gas in the MIG and CMT processes to find optimal welding parameters.

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References

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