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With the development of pulse TIG welding technology, the fast-frequency pulse TIG (FFP-TIG) welding technology using 20 kHz ultra-high frequency (UHF) pulse modulation current with obvious high-frequency shrinkage effect and electromagnetic stirring effect has been gradually improved. FFP-TIG welding overcomes many shortcomings of traditional pulse TIG welding, such as shallow penetration, unconcentrated current energy, large heat-affected zone, and many welding defects. At present, FFP-TIG welding has become the preferred method of metal connection in high-end manufacturing process, with broad prospects for development and application. Firstly, this study clarifies the working principle and arc characteristics of FFP-TIG welding, and reveals the advantages of FFP-TIG welding compared with ordinary pulse TIG welding; Secondly, the research status of FFP-TIG welding power supply and welding process at home and abroad is reviewed; Finally, the process characteristics of FFP-TIG welding are summarized, and its developing trend in industrial field is prospected.

A review on fast-frequency pulse TIG welding technology