研究目的
Investigating the optimization of laser welding conditions for dissimilar joining of high strength tensile steels to improve weld quality and mechanical properties.
研究成果
Laser welding of dissimilar butt welds between Inconel 718 and AISI4140 was successfully evaluated. The parameters of welding speed and laser power were found to be the most influencing welding conditions. The actual and predicted values of the weld zone geometries were well matched. The ANOVA suggested the optimization and regression equations are significant and predicted the fusion and heat affected zones accurately.
研究不足
The study focuses on specific materials and thicknesses, and the optimization may not be directly applicable to other materials or thicknesses without further experimentation.
1：Experimental Design and Method Selection:
Laser welding was conducted for butt joints with pulsed Nd:YAG laser process. The welding conditions of laser power and welding speed were selected based on initial experimental trails.
2：Sample Selection and Data Sources:
High tensile steels of Inconel alloy 718 and AISI4140 steels with a thickness of 2 mm plates were used.
3：List of Experimental Equipment and Materials:
Pulsed Nd:YAG laser process, shielding gas of argon.
4：Experimental Procedures and Operational Workflow:
Welding was conducted with varying laser power and welding speed, and the cross-section of the welded specimens was prepared for characterization.
5：Data Analysis Methods:
Response surface methodology (RSM) and Box-Behnken Design (BBD) were used for optimization and analysis of variance (ANOVA) was used to check the validity of the model.
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