研究目的
Investigating the optimal overlapping ratio and scanning strategy in laser cladding to achieve near-net shaping of parts with irregular geometric cross-sections.
研究成果
The optimal overlapping ratio for minimal surface flatness is about 20%. Changing the scanning sequence from left-to-right to center-to-sides reduces negative effects of accumulated heat, improving cladding efficiency. Precise control of layer width and height is essential for near-net shaping of triangular stacking.
研究不足
The study is limited to specific materials (high-speed steel powder and 1045 steel substrates) and may not generalize to other materials. The effects of other critical variables like laser power and scanning speed are not fully explored.
1：Experimental Design and Method Selection:
The study focuses on optimizing overlapping ratio and scanning strategy in laser cladding to achieve near-net shaping. Theoretical models and experimental methods are used to evaluate surface flatness and metallographic aspects.
2：Sample Selection and Data Sources:
High-speed steel powder (W6Mo5Cr4V2/Fe) and 1045 steel substrates are used. Data is collected through optical microscopy and SEM.
3：List of Experimental Equipment and Materials:
Includes an industrial robot arm (M-710iC/50, FANUC), cladding head (FDH0273, Lasermech), laser generator (YLS-3000, IPG), and water cooling device (TFLW-4000WDR-01-3385, Sanhe Tongfei).
4：Experimental Procedures and Operational Workflow:
Substrates are cleaned, powders are heated, and cladding is performed with varying overlapping ratios and scanning strategies. Post-cladding, specimens are sectioned, ground, and polished for observation.
5：Data Analysis Methods:
Surface flatness is evaluated using optical microscopy and SEM. Statistical techniques are applied to analyze the effects of overlapping ratio and scanning strategy on surface quality.
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