Abstract
High Power Diode Lasers (HPDL) systems are outperforming conventional technologies for surface transformation hardening and surface cladding. The HPDL represents a breakthrough for laser processing because of its shorter wavelength and higher wall plug electrical efficiency than today’s Nd:YAG and CO2 lasers. Because of the increased surface absorption and the high operating efficiency of the HPDL system, it can outperform induction-heating systems for case depths less than 0.06“ when trying to achieve a Rockwell hardness in excess of 58 in martensitic steels. Similarly, when depositing high hardness, high corrosion resistant claddings, the HPDL system can deposit clads less than 0.04” thick with nominal surface dilution at speeds surpassing today’s cladding technologies. The HPDL system can be used to clad soft substrate materials with either a wire feed, a powder feeder or a thermal spray method. This paper will describe the processes developed; the results achieved and compare these results to what can be achieved with more conventional technologies.High Power Diode Lasers (HPDL) systems are outperforming conventional technologies for surface transformation hardening and surface cladding. The HPDL represents a breakthrough for laser processing because of its shorter wavelength and higher wall plug electrical efficiency than today’s Nd:YAG and CO2 lasers. Because of the increased surface absorption and the high operating efficiency of the HPDL system, it can outperform induction-heating systems for case depths less than 0.06“ when trying to achieve a Rockwell hardness in excess of 58 in martensitic steels. Similarly, when depositing high hardness, high corrosion resistant claddings, the HPDL system can deposit clads less than 0.04” thick with nominal surface dilution at speeds surpassing today’s cladding technologies. The HPDL system can be used to clad soft substrate materials with either a wire feed, a powder feeder or a thermal spray method. This pap...
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