| 摘要 |
This invention relates to methods in which a protective material (44) is introduced into a metallic component, or is used to block a hole (48) in the metallic component, a filler material (34) is pre-placed or directed to an external surface of the metallic component, the filler material is heated with at least one energy beam (40) to melt or sinter a metal powder (36) contained in the filler material to form a cladding layer (16), and the protective material is removed from the metallic component, such that the protective material contains, or generates upon being heated, a protective substance. The present invention also relates to preforms (72) containing an upper section (74) containing a powdered metal (36) and a flux (38), and a lower section (76) containing a protective material (78), such that the protective material contains, or generates upon being heated, a protective substance. |
