When overlaying with a laser an optical arrangement is used to focus the laser beam on the work piece and heat it. Simultaneously hardfacing material in the form of powder is introduced into the laser beam and melted. Due to the narrow heat affected zone and the fast cooling rate the heat input is low, thereby producing an almost stress free overlay.
Compared with other welding processes with higher heat inputs, for a given hardfacing alloy the fast cooling rate of the laser process produces an overlay with a significantly higher hardness and finer microstructure.
Benefits of Laser are:
Low Heat Input
Almost Stress Free Overlays
To view product relevant to this process, please view our PTA Laser Powder product page.