The overlapped structures can be welded in the solid state, even without gas shielding.
A continuous wave CO2 laser beam with the power of 5kW was irradiated on these AlSi cast alloy substrates under various defocused distance of laser beam with the argon gas shielding.
in cities, ozone is a toxic pollutant spewed out by cars, but high in the atmosphere it is a vital gas shielding the Earth from dangerous ultraviolet rays.
The laser surface treatment of engineering parts requires gas assisted processing, since the assisting gas shields the surface from the high temperature oxidation during the laser heating process.
In this paper, wrought magnesium alloy AZ31B sheets were brazed by means of high-frequency induction heating device using a novel Al-based filler metal in argon gas shield condition.
An investigation is reported of the laser surface cladding of self-fluxing Fe Cr Ni alloys on a medium carbon steel substrate using the preplaced powders method with gas shielding or vacuum protection.
The welder judges the effectiveness of the shielding and increases the nozzle size to increase the area protected by the external gas shield as needed.
Filler rods composed of metals with low melting temperature, such as aluminum, require that the operator maintain some distance from the arc while staying inside the gas shield.
The filler rod is withdrawn from the weld pool each time the electrode advances, but it is never removed from the gas shield to prevent oxidation of its surface and contamination of the weld.
