| 摘要 |
A method (400) for controlled removal of a portion (52) of a diffusion coating from a coated superalloy component (10) and a method (500) for rejuvenating a coated superalloy component (10) are provided. The methods (400, 500) include providing (401, 501) the component (10) having an oxide layer (40), an additive layer (50) between the oxide layer (40) and a diffusion zone (60), the diffusion zone (60) being between the additive layer (50) and a superalloy substrate (70) of the superalloy component (10). The methods (400, 500) include selectively removing (403, 503) the oxide layer (40) and a portion (52) of the additive layer (50) by grit blasting, wherein removing creates an exposed portion (56). Rejuvenating (500) includes applying (505) an aluminide coating to the exposed portion (56) and heat treating (507) at a preselected elevated temperature to form a rejuvenated protective aluminide coating (90) on the superalloy component (10). |
