研究目的
To study the reasons of back spatters in laser welding of commercial pure titanium (CP-Ti) and explore the relationship between welding parameters and the spatters.
研究成果
The study concludes that backside spatters in laser welding of CP-Ti are influenced by the presence of a keyhole and the shear stress from metal vapor jets. Increasing laser power or welding speed increases spatter formation, while a defocused distance of 30 mm eliminates spatters by obscuring the keyhole.
研究不足
The study focuses on backside spatters in laser welding of CP-Ti, with limited exploration of front-side spatters. The experimental parameters are specific to thin plates (0.5 mm), which may not fully represent thicker materials.
1：Experimental Design and Method Selection:
The study involved laser welding of CP-Ti plates under different parameters (laser power, welding speed, defocused distance) and recording the welding process with a high-speed camera to analyze spatter formation.
2：Sample Selection and Data Sources:
Commercial pure titanium (Grade 2) TA2 plates with dimensions 100 mm × 50 mm × 0.5 mm were used.
3：5 mm were used.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: RCL-2200 multimode fiber laser, Phantom VEO 710S high-speed camera, CAVILUX? Smart laser generator as auxiliary light source.
4：Experimental Procedures and Operational Workflow:
High-speed photography was used to capture the weld pool at 5000 frames per second. The effect of laser power, welding speed, and defocused distance on spatter formation was studied.
5：Data Analysis Methods:
The number of spatters was statistically analyzed from high-speed images to explore the relationship between welding parameters and spatter characteristics.
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