When using a laser welder, there are two different methods or modes to transfer energy from the laser to the welding material. Depending on the power density, this is the power factor of the laser, and in the welding area, the laser welding mode can be conduction mode or keyhole mode.
It should be emphasized that the type of welding pattern that occurs is determined by the amount of power delivered to the substrate and the nature of the material being welded, the main difference between the two laser welding methods is the energy transferred to the metal. You can think of conduction mode as low energy density, while keyhole mode contains higher energy density. But remember, energy density is the most influential mode.
And because the energy density is the cross-sectional area of the weld through which the power supply passes, changing the welding ratio or dividing the power of the laser beam by the defined type will affect the welding modeConduction mode welding is basically heating the low-energy density weld on the surface of the material to be welded, and once the surface is heated, it conducts heat deeper into the material.
Because this welding mode is low energy density welding, the weld size on the surface is usually large, and the penetration depth of the weld is usually shallow. When you move from low energy density welding to high energy density welding, the mode changes from conduction mode to keyhole mode again mentions the definition of energy density, which can be achieved by reducing the weld size or increasing the laser beam power Most simply, small hole mode fusion welding is welded due to the higher energy density of small holes or holes in the material.