研究目的
Investigating the effects of laser power, welding speed and defocusing distance on the underwater laser welding quality of 304 stainless steel butt joints.
研究成果
1. The laser power and welding speed strongly affects the joint geometry, while the effect of defocusing distance on joint geometry is not significant. 2. The optimized underwater laser weld can be obtained with the laser power of 2.0 kW, the welding speed of 2.0 m/min and the defocusing distance of 1 mm. 3. The ferrite of the underwater weld is lathy ferrite and dendritic ferrite while that of in-air weld is dendritic ferrite, attributed to the rapid cooling rate.
研究不足
The study focuses on shallow water conditions and may not fully represent the challenges of deeper water welding. The effects of water pressure and other environmental factors are not extensively covered.
