Irradiation apparatus, metal shaping apparatus, metal shaping system, irradiation method, and method of manufacturing metal shaped article

摘要

Residual stress that can occur in a metal shaped article is reduced. An irradiation device (13) includes a first irradiation unit (13A) for irradiating a first region of a powder bed (PB) with a first laser beam (LA), and a first bed of the powder bed (PB). A second irradiation unit (13B) that irradiates the second region with the second laser beam (LB). In the second irradiation unit (13B), the energy density of the second laser beam (LB) irradiated to the second region is the energy density of the first laser beam (LA) irradiated to the first region. The second laser beam (LB) is irradiated so as to be lower. [Selection] Figure 1