Overview of Induction Hot Wire Preheating Techniques in GTAW and GMAW

Authors

  • Bhuwadol Thanathattakum Department of Materials Engineering, Faculty of Engineering, Kasetsart University
  • Sakdipat Jaturapronperm Department of Materials Engineering, Faculty of Engineering, Kasetsart University
  • Thanawat Santawee Department of Materials Engineering, Faculty of Engineering, Kasetsart University
  • Surapit Posri Department of Materials Engineering, Faculty of Engineering, Kasetsart University
  • Aphichart Rodchanarowan Department of Materials Engineering, Faculty of Engineering, Kasetsart University

Keywords:

Arc Welding, GTAW, GMAW, Hot Wire, Induction Heating Coil

Abstract

Preheating filler wire before welding using induction heating coils is a technique that has been developed and applied to various welding processes, such as Gas Tungsten Arc Welding (GTAW) and Gas Metal Arc Welding (GMAW), to improve the melting efficiency of the filler wire. This is achieved by reducing the temperature difference between the filler wire and the base material, resulting in a higher deposition rate without increasing the overall heat input to the weld. In addition, this technique benefits the mechanical properties of the weld, such as hardness, toughness, and impact resistance. It also helps to reduce the risk of porosity, as preheating assists in removing moisture on the surface of the filler wire prior to welding. Moreover, it reduces the heat input into the workpiece, leading to finer grain structures and increased hardness in the weld zone. This article presents a study on the effects of preheating filler wire using induction heating coils on deposition rate, microstructure, mechanical properties, and the influence of electromagnetic fields induced by the heating coils on arc stability and weld quality

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Published

2026-03-22

How to Cite

[1]
B. . Thanathattakum, S. . Jaturapronperm, T. . Santawee, S. . Posri, and A. . Rodchanarowan, “Overview of Induction Hot Wire Preheating Techniques in GTAW and GMAW”, NKRAFA J.Sci Technol., vol. 22, no. 1, pp. 168–180, Mar. 2026.

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Vol. 22 No. 1 (2026): January - June

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