研究目的
Investigating the effect of laser power on the microhardness of laser cladded Titanium.
研究成果
The study revealed that as the laser power increased, the microhardness of the laser cladded Titanium also increases. A predictive computational equation of microhardness was generated, showing significant model terms with logical relationships.
研究不足
The study was limited to the effect of laser power on microhardness, keeping other parameters constant. Potential areas for optimization include varying other parameters like scanning speed and powder flow rate.
1：Experimental Design and Method Selection:
The laser power was varied between
2：0 kW and 0 kW while the scanning speed, powder and gas flow rate were kept constant. A full factorial experiment design was used with Design Expert 11 software. Sample Selection and Data Sources:
Steel rail substrate and Titanium powder were used. The steel rail plate was sandblasting and washed with acetone.
3：List of Experimental Equipment and Materials:
Kuka robot with an Nd-YaG laser head and an end effector co-axial powder nozzle guided in a glove box.
4：Experimental Procedures and Operational Workflow:
The laser cladded sample was cut for metallographic investigation, etched with Kroll reagent, and polished. The scanning electron microstructure of the samples were examined.
5：Data Analysis Methods:
The microhardness was carried out at a load of 500 g and dwell time of 15 secs. The results were analyzed using Design Expert 11 software.
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