Investigation of the laser cladding powder spray distribution using a laser sheet illumination and a CCD camera

摘要

In many industrial applications, the material surface is, most of the time, the preponderant factor in the life time of a pice. In such cases, it is relevant to be able to improve the superficial properties of the material. To do so, one solution: the laser cladding process, consists in deposing a hardfacing alloy where the constraints are more likely to occur. The process involves the delivery of fine grained alloy powder blown into the melt pool during the laser irradiation. In a coaxial delivery system, the powder spray distribution as well as the grain speed have a tremendous impact on the process efficiency.