Component temperature versus laser-welding parameters

The component temperature near a laser weld which is critical because of possible damage to the explosive powder adjacent to the member being welded was examined. The thermal excursion experienced at the powder cavity wall was evaluated. The affect of changes in the laser welding parameters on the powder cavity wall temperature was determined. The objective lens to work distance, pulse rate, and beam power parameters were varied and the peak temperature varied from 1170C to 3110C in response to welding parameter changes. It is concluded that by utilizing a selected set of welding parameters, the design requirement of a 1600C maximum powder cavity wall temperature can easily be satisfied.