| Autor: |
Zhao, Y., Wang, X., Liu, Z., Khaskin, V. |
| Předmět: |
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| Zdroj: |
Automatic Welding / Avtomatitcheskaia Svarka; 2024, Issue 4, p15-23, 9p |
| Abstrakt: |
The results of consumable electrode pulsed-arc welding of aluminium alloy 1561 of 6 mm thickness (P-MIG) with and without addition of focused radiation of the Nd:YAG laser were analyzed. During laser-P-MIG welding, the influence of the arc energy source improves absorption of laser radiation and promotes high-quality formation of the weld reinforcement, and the influence of the laser source leads to an increase in the depth of penetration due to the formation of a vapour-gas channel (keyhole) and to a decrease in the current density of the anode region of the arc on the electrode wire, which reduces emissions of welding aerosols. Factors influencing the effectiveness of laser radiation during laser-P-MIG welding were determined. It is shown that an increase in laser power leads to an increase in arc voltage with a simultaneous decrease in welding current. Formation of high-quality welds by P-MIG welding of alloy 1561 requires an energy input of 4.5…5.0 kJ/cm. Here, a regular structure of the weld metal with the dendritic parameter of 13…15 μm and joint strength of 90…92 % of the strength of the base metal is formed. Introduction of focused radiation of a 3.0 kW Nd:YAG laser into the welding process allows reducing the energy input by approximately half, due to which the dendritic parameter decreases to 10 μm, and the strength of the joints increases to 93…96 % of base metal strength. 17 Ref., 3 Tabl., 8 Fig. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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