1. Weld Penetration and Width
Short Pulse Width: Short pulse width means the laser energy is released in a concentrated burst within a short time, suitable for welding thin sheet materials. Short pulse widths can produce a deeper weld penetration, but the weld width is relatively narrow. Suitable for applications requiring high precision and a small heat-affected zone, such as welding microelectronic components.
Long Pulse Width: Long pulse width means the laser energy is released slowly over a longer period, suitable for welding thick sheet materials. Long pulse widths can produce a wider weld width, but the weld penetration is relatively shallower. Suitable for applications requiring large-area welding, such as the assembly of automotive bodies.
2. Heat-Affected Zone
Short Pulse Width: Due to the short pulse duration, short pulse widths result in a smaller heat-affected zone, reducing the risk of thermal deformation and hot cracking, suitable for welding heat-sensitive materials.
Long Pulse Width: Due to the long pulse duration, long pulse widths result in a larger heat-affected zone, potentially leading to thermal deformation and hot cracking, suitable for applications where heat-affected zone requirements are not high.
Welding Speed
Short Pulse Width: Short pulse widths allow for higher welding speeds, suitable for applications requiring mass production and high efficiency. Long pulse width: Long pulse width welding speed is relatively slow, suitable for applications requiring high welding quality but not high production efficiency.
3. Material adaptability
Short pulse width: Suitable for welding high-reflectivity materials and thin plate materials, such as copper and aluminum.
Long pulse width: Suitable for welding low-reflectivity materials and thick plate materials, such as carbon steel and stainless steel.