研究目的
To elaborate a new approach in selective laser cladding using conical laser beams for efficient energy delivery to powder stream and surface heating.
研究成果
The new method of laser cladding using conical beams allows for efficient and uniform heating of the deposited material and surface, reducing energy costs and increasing cladding accuracy. It is particularly effective for dense powder streams and wire deposition, offering high productivity and minimal heat input.
研究不足
The method's efficiency is highly dependent on the density and uniformity of the powder stream, and the precise control of laser power distribution.
1：Experimental Design and Method Selection:
The method involves dividing an initial round laser beam into 2 circular beams with regulated power distribution, transforming these into conical beams for separate focusing on the surface and deposited material.
2：Sample Selection and Data Sources:
Uses dense powder streams (104-105 1/cm3) and wire for deposition.
3：List of Experimental Equipment and Materials:
Includes a laser, adjustable beam expander, conical mirrors, and powder feeder.
4：Experimental Procedures and Operational Workflow:
Describes the process of feeding cladding material into the focal region of the laser beam, forming annular beams, and focusing them separately.
5：Data Analysis Methods:
Calculations of laser intensity attenuation and temperature distribution in the powder stream and on the surface.
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