Effect of focal position on laser-MAG arc hybrid weld bead of thick high-strength steel plate

Ishida, Kazuya; Tashiro, Shinichi; Mizutani, Masami; Tanaka, Manabu

doi:10.2207/qjjws.38.131s

Cited by 2 publications

(2 citation statements)

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“…Generally, the shielding gas used in HLAW is mostly composed of an inert gas such as Argon (Ar) and Helium (He) [3], but, according to the material, laser type and arc parameters, carbon monoxide (CO) or carbon dioxide (CO 2 ) can also be used [26]. During hybrid laser arc welding with CO 2 laser, absorption of the laser energy by the laser induced plasma and reduction of the laser intensity that reaching the weld pool is often occurred, due to longer wavelength [19]. The use of high ionization potential shielding gas like helium reduces the effect of plasma absorption, therefore during hybrid laser arc welding with CO 2 laser, a mixture of argon, helium and CO 2 is used [19].…”

Section: Shielding Gas and Flow Ratementioning

confidence: 99%

“…During hybrid laser arc welding with CO 2 laser, absorption of the laser energy by the laser induced plasma and reduction of the laser intensity that reaching the weld pool is often occurred, due to longer wavelength [19]. The use of high ionization potential shielding gas like helium reduces the effect of plasma absorption, therefore during hybrid laser arc welding with CO 2 laser, a mixture of argon, helium and CO 2 is used [19]. The use of helium ensures deeper penetration, the argon improves the arc stability, while a small percentage of oxygen less than 5% reduces the spatter formation and improves metal transfer during the welding process [3].…”

Section: Shielding Gas and Flow Ratementioning

confidence: 99%

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Impact analysis of the hybrid laser arc welding parameters of structural steels: State of the art

Petreski,

Runchev,

Vrtanoski

2023

Zavariv zavar konstrukcije

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The effectiveness of the hybrid laser arc welding is based on the combination of two heat sources in a single welding process, resulting in welding process that is characterized with higher welding speed, increased productivity, deeper penetration, stable process, better gap bridging ability, less heat input to the welding material and high flexibility. The physical complexity of the process is a main disadvantage, i.e. an increased number of parameters that need to be synchronized and optimized in order to obtain a perfect weld. In this paper, based on the previous experimental research, a complete analysis of the primary hybrid laser arc welding parameters was performed, and general conclusions were drawn regarding their impact on the welding process stability, the weld shape and its mechanical characteristics. The introduction part contains a general analysis of previous research. In the second part, characteristics of the performed hybrid welds in structural steels and detailed analysis are presented. In the final part, general conclusions are made regarding the influence of the primary hybrid laser arc welding parameters on the structural steel.

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