11:15 AM - 11:30 AM
[18a-136-9] CoCr layer formation on SUS plate by multi laser coating method
Keywords:Laser coating, CoCr alloy, Low dilution
A micro laser cladding system was developed to be realized low dilution area and fine cladding.
The fiber coupled direct diode laser module was employed. An output power and wavelength of the one module were 50 W and 915 nm, respectively. The six lasers were guided to focusing head with every optical fiber, which core diameter is 100 µm. Beam profile at focal point of the combined six lasers was set a spot diameter of 400 µm by CCD camera. Here, the Co-alloy called by Stellite, was used as a clad material. The focusing head has a function to supply a Co-alloy powder at a focal point from a center nozzle. When laser irradiation and powder supply are simultaneously performed toward to a stainless steel 304 substrate, the Co-alloy powder was melted and solidified on the substrate to form a cladding layer. The melting and solidification process for Co-alloy was observed in real time using synchrotron radiation imaging technique at BL22XU in SPring-8. From results, it was clarified that the Co-alloy melt-solidification phenomenon greatly differs for laser output power. At the output power of 60W, it was found that a minimum amount of molten pool was formed and then solidified to form the cladding layer.
The fiber coupled direct diode laser module was employed. An output power and wavelength of the one module were 50 W and 915 nm, respectively. The six lasers were guided to focusing head with every optical fiber, which core diameter is 100 µm. Beam profile at focal point of the combined six lasers was set a spot diameter of 400 µm by CCD camera. Here, the Co-alloy called by Stellite, was used as a clad material. The focusing head has a function to supply a Co-alloy powder at a focal point from a center nozzle. When laser irradiation and powder supply are simultaneously performed toward to a stainless steel 304 substrate, the Co-alloy powder was melted and solidified on the substrate to form a cladding layer. The melting and solidification process for Co-alloy was observed in real time using synchrotron radiation imaging technique at BL22XU in SPring-8. From results, it was clarified that the Co-alloy melt-solidification phenomenon greatly differs for laser output power. At the output power of 60W, it was found that a minimum amount of molten pool was formed and then solidified to form the cladding layer.