Underwater laser processing method and apparatus

Details Underwater laser processing method and apparatus Underwater laser processing method and apparatus

G - Physics

21

C

G21C 21/00 (2006.01) B08B 7/02 (2006.01) B23K 26/12 (2006.01) G21C 13/087 (2006.01)

Patent

CA 2168413

An underwater laser processing method is carried out by irradiating, through a laser beam irradiation apparatus, a laser beam having a high output, a short pulse and a visible wavelength to a surface of a structure immersed in a water to improve residual stress of a material of the surface of the structure and remove a crack or a CRUD thereof. The laser beam irradiation apparatus comprises a pulse laser device suspended into a water in which a metal material is accommodated from an upper side thereof for irradiating a laser beam having a visible wavelength to a processing position, a beam strength adjusting device for adjusting an output per 1 pulse of a laser beam generated by the pulse laser device and a mechanism for adjusting a spot diameter and a multiplexing ratio of an irradiated beam.

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