A Study on CO2 Laser-TIG Hybrid Welding of Zinc-Coated Steel Sheet Part 2: Relationship between Welding Parameters and Weldability

Kim, Cheol-Hee; Choi, Woong-Yong; Chae, Hyun-Byung; Kim, Jeong-Han; Rhee, Se-Hun

Journal of KWJS 2006;24(4):27-31.
Published online October 16, 2006.

A Study on CO2 Laser-TIG Hybrid Welding of Zinc-Coated Steel Sheet Part 2: Relationship between Welding Parameters and Weldability

Cheol-Hee Kim, Woong-Yong Choi, Hyun-Byung Chae, Jeong-Han Kim, Se-Hun Rhee

Abstract

Optimization of process parameters for laser-arc hybrid welding process is intrinsically sophisticated because the process has three kinds of parameters?arc, laser and hybrid welding parameters. In this paper, the relationship between weldability and several process parameters such as laser beam-arc distance, electrode height, welding current and welding speed, were investigated by the full factorial experimental design. Weld quality was evaluated by using weight of spatters which is related with the pore area. It was found that the weld quality was increased with the increases in laser beam-arc distance and welding current, and decreased with the increases in electrode height and welding speed.

Key Words: Laser-TIG hybrid welding, CO2 laser, Zinc-coated steel, Welding parameter, Weldability