研究目的
Investigating the effects of laser power, scanning speed, and focal plane position on the laser surface hardening process of AISI 410 stainless steel to achieve optimal hardness, depth of hardness, and minimal ferrite percentage.
研究成果
The study successfully optimized the laser surface hardening process of AISI 410 stainless steel, achieving maximum hardness of 670 Vickers, maximum depth of hardness of 2.2 mm, and minimum ferrite percentage of 0.45%. The laser power was found to have the most significant effect on the outcomes.
研究不足
The study focuses on AISI 410 stainless steel and may not be directly applicable to other materials. The optimization is based on specific laser parameters and may require adjustment for different laser systems or conditions.
1：Experimental Design and Method Selection
Central composite design (CCD) five-level RSM design with three parameters was used to study the effects of laser power, scanning speed, and focal plane position on the hardened zone geometry and surface hardness distribution.
2：Sample Selection and Data Sources
AISI 410 martensitic stainless steel was used as the workpiece. The chemical composition of the steel was provided, and samples were prepared for metallographic analysis after laser hardening.
3：List of Experimental Equipment and Materials
High power diode laser (maximum power of 1600 W), optical microscopy (OM) for microstructure observation, micro-indentation tester (BUEHLER, USA) for microhardness measurements.
4：Experimental Procedures and Operational Workflow
Laser surface hardening was performed with varying laser power, scanning speed, and focal plane position. Post-processing included sectioning, mounting, grinding, polishing, and etching of samples for analysis.
5：Data Analysis Methods
Response Surface Methodology (RSM) was used to analyze the effects of input parameters on output responses. Desirability function approach was applied for optimization.
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