Functionally graded metal matrix composite sheet

Details Functionally graded metal matrix composite sheet Functionally graded metal matrix composite sheet

B - Operations, Transporting

22

D

B22D 11/00 (2006.01) C22C 32/00 (2006.01)

Patent

CA 2683970

Method of making a functionally graded metal matrix composite (MMC) product (20) having a solid central layer (18) enriched with particulate matter (10) sandwiched between outer shells (6, 8) by providing molten metal (M) containing particulate matter (10) to a pair of advancing casting surfaces (D1, D2), solidifying the molten metal (M), and withdrawing the MMC product (20) from between the casting surfaces (D1, D2). The solid central layer (18) contains a higher concentration of particulate matter (10) than either of the outer layers (6, 8). The MMC product (20) combines easy mechanical working characteristics and appearance of the metallic outer layers with the enhanced properties provided by the solid central layer (18).

L'invention concerne un procédé de fabrication d'un produit (20) composite à gradient fonctionnel (MMC) présentant une matrice métallique et une couche centrale solide (18), enrichie en matière particulaire (10), prise en sandwich entre des couches extérieures (6, 8). Ce procédé consiste à: appliquer un métal fondu (M) contenant de la matière particulaire (10) sur deux surfaces de coulage (D1, D2) qui s'avancent; solidifier le métal fondu (M); et retirer le produit MMC (20) d'entre les surfaces de coulage (D1, D2). La couche centrale solide (18) contient une concentration de matière particulaire (10) supérieure à la concentration des couches extérieures (6, 8). Le produit MMC (20) combine des caractéristiques fonctionnelles mécaniques et l'aspect des couches extérieures métalliques aux propriétés accrues de la couche centrale solide (18).

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