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As shown in Figure 1 the line of laser light along the short axis is moved perpendicular to the long axis.The biggest benefit of HPDDL laser cladding is that the unique line source allows the user to produce clads with a controllable width without scanning.
The light emitted at the facet of the laser diode is highly divergent and astigmatic.
To make this usable, a lenslet array is close coupled to a two dimensional array of laser diodes.
The corrosion resistance and wear resistance was also measured for the appropriate samples.
This process is highly advantageous in comparison with competing coating methods such as plasma spraying, arc welding, and other laser sources.
CO2 and Nd: YAG lasers have a smaller spot; thus the laser must be scanned over the cladded area.
The wavelength of the HPDDL is 808 nm, compared with 1.064 microns a Nd: YAG laser and 10.6 microns of the CO2 laser.
156 is a general-purpose cobalt hard facing material. The dilution of the coatings was analyzed through the use of a Scanning Electron Microscope [SEM].
Through analysis it was discovered that dilution is kept to a minimum, in the range of 0 to .02%.
SEM analysis is a true, accurate measure of the dilution, or intermixing of the clad and substrate.
Laser alloying is a process that is often grouped with laser cladding operations.