Method to produce void-free ferrous and non-ferrous aerospace structural castings
AssigneeSpirit AeroSystems, Inc.
InventorsRahbar Nasserrafi, Jennifer Lyn Wilson, Ni Yen Luu
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Abstract
A method of treating a cast metal matrix, the method comprising steps of depositing a self-fluxing first layer of material on an outer surface-connected void of the cast metal matrix, depositing a second layer of material on the cast metal matrix thereby closing off the outer surface-connected void so that the outer surface-connected void is an effective internal void, and hot isostatic pressing the cast metal matrix so that the self-fluxing first layer facilitates healing the effective internal void and complete metallurgical bonding of the surfaces of the outer surface-connected void.
Claims10
A method of treating a cast metal matrix, the method comprising steps of:
- depositing a self-fluxing first layer of material on an outer surface-connected void of the cast metal matrix;
- depositing a second layer of material on the self-fluxing first layer of material on the cast metal matrix thereby closing off the outer surface-connected void so that the outer surface-connected void is an effective internal void;
- hot isostatic pressing the cast metal matrix, the self-fluxing first layer of material, and the second layer of material;
- and
- during the hot isostatic pressing, forming the self-fluxing first layer of material into a transient liquid phase, then diffusing the transient liquid material into the cast metal matrix to increase melting temperature at a surface of the cast metal matrix, whereby the method of treating the cast metal matrix facilitates healing the effective internal void and complete metallurgical bonding of surfaces of the outer surface-connected void.
Dependencies are inferred from the claim text.