研究目的
To develop a simple numerical model for laser cladding that accurately predicts clad-track geometry, dilution, and substrate temperature without complex techniques.
研究成果
The developed simple heat-conduction-based numerical model accurately predicts clad-track geometries for different combinations of substrate and clad powder materials, with errors within 5% for clad height and 10% for clad width. It also effectively estimates dilution and performs well in multiple-track scenarios, proving its utility in laser cladding process design.
研究不足
The model does not simulate the molten liquid phase of the substrate, potentially limiting its accuracy in predicting melt pool dynamics. It also assumes a fixed vertical distance between the laser head and substrate surface, which may not account for all real-world variations.
1：Experimental Design and Method Selection:
The model uses a mass function to register clad mass deposition on the substrate, estimating clad-track height without complex techniques.
2：Sample Selection and Data Sources:
Experiments were conducted with two combinations of substrate and clad powder materials (SUS 304 with Inconel 718 and 6061 aluminum alloy with A356 aluminum alloy) to validate the model.
3：List of Experimental Equipment and Materials:
Equipment includes a TRUMPF TruDisk 6002 laser, an ABB robot for laser head movement, and a TAFA Model 1264i powder feeding system.
4：Experimental Procedures and Operational Workflow:
Laser cladding was performed with varying laser power, laser-head speed, and powder feeding rate to lay single and multiple clad tracks.
5：Data Analysis Methods:
Clad profiles were measured using an electronic microscope, and the model's predictions were compared with experimental data.
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