Electric heating – Metal heating – By arc
Patent
1998-05-15
2000-07-04
Evans, Geoffrey S.
Electric heating
Metal heating
By arc
21912184, B23K 2600
Patent
active
060842024
ABSTRACT:
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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Aoki Nobutada
Ito Arata
Kikunaga Muneyoshi
Konagai Chikara
Mukai Naruhiko
Evans Geoffrey S.
Kabushiki Kaisha Toshiba
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