| 主权项 |
1. A powder overlay nozzle comprising:
an inner nozzle member including a laser passage for passing laser beam; and an outer nozzle member externally fitted on the inner nozzle member, the inner nozzle member and the outer nozzle member forming a discharge space between the members for passing powder, wherein the outer nozzle member includes a supply channel for supplying the powder to the discharge space in a direction inclined with respect to an axis of the powder overlay nozzle at a portion of the supply channel that is in direct contact with the discharge space, such that a portion of the supply channel that communicates with the discharge space is inclined with respect to the axis of the powder overlay nozzle, wherein the discharge space includes a plurality of flow passage walls defining the discharge space into a plurality of discharge passages about the axis, wherein, of the plurality of flow passage walls, a flow passage wall disposed along a central axis of the supply channel includes a guide portion for guiding the powder supplied from the supply channel in a direction inclined with respect to the central axis, wherein the guide portion includes a protruding portion protruding toward the supply channel beyond the flow passage walls other than the flow passage wall disposed along the central axis of the supply channel. |
