Droplet Transfer and Microstructure of Q235 Steel Thick Plate Using CO₂ Welding with Additional Longitudinal Magnetic Field Controlling

Abstract:

In this paper, a new welding experiment is studied by applying an additional longitudinal electromagnetic field to CO2 welding process (abbr. LEM-CO2 welding).The characteristics of droplet transfer, macrostructure and microstructure are compared between LEM- CO2 welding and general CO2 welding on Q235 low carbon steel thick plate joint. The research results shows that, an additional longitudinal magnetic field can have a significant effect on properties of the droplet transfer in CO2 welding, the frequency and stability of the droplet transfer in LEM-CO2 welding are improved. The grains of welding seam are refined and welding joints has a higher quality. So the additional longitudinal magnetic field is a very simple and effective method to improve the properties of CO2 welding thick plate joint.

• Periodical: Advanced Materials Research (Volumes 102-104)
• Pages: 451-454
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.102-104.451
• Online since: March 2010
• Authors: Qian Luo, Duan Min Lu, Jian Luo
• Keywords: CO₂ Welding, Droplet Transfer, Longitudinal Magnetic Field, Microstructure

References

[1] J. Luo, Q. Luo, Y.H. Lin and J. Xue: Weld J, Vol. 82 (2003), p.202.

[2] S. Kou and Y. Le: Weld J, Vol. 64 (1985), p.55.

[3] C.S. Jia and K.M. Xiao: Welder, Vol. 17 (1987), p.14.

[4] X.Q. Yin, J. Luo, H. G . Li, Y.S. Wang and C.S. Jia: J Mech Strength, Vol. 21 (1999), p.268.

[5] J. Luo, Y.S. Wang, X.Q. Yin and C.S. Jia: Aviation Manufact Technol, Vol. 4 (2001), p.38.

[6] Z.J. Liu, J.D. Liu: Weld J, Vol. 22 (2001), p.73.

[7] J. Luo, Y. Lin, Q. Luo and Y. Wu: Sci Technol Weld Join, Vol. 9 (2004), p.465.

[8] Z.J. Liu, Y.H. Su: Weld J, Vol. 28 (2007), p.45.

[9] J. Luo: J Adv Manuf Syst, Vol. 7 (2008), p.167.

[10] J. Luo, T. Jia, X. Yin and J. Xie: Acta Metal Sinica, Vol. 33 (1999), p.330.