Solder coating, method for coating a component, component...

C - Chemistry – Metallurgy – 23 – C

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C23C 4/08 (2006.01) C23C 28/00 (2006.01) C23C 30/00 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2711053

A solder coating (10), particularly for a blade tip of a gas turbine, comprises at least two superimposed layers (14, 16). A first layer (14) comprises a solder and a binding agent. A second layer (16) comprises particles (18) of an MCrAIY alloy, grinding particles (20) and a binding agent. The heating of solder coating (10) leads to at least a partial dissolution of particles (18) of the MCrAIY alloy by means of the liquid solder before the MCrAIY alloy melts.

Revêtement (10) appliqué par brasage, en particulier pour une pointe d'aube d'une turbine à gaz, qui comprend au moins deux couches superposées (14, 16). Une première couche (14) comporte un métal d'apport et un liant. Une deuxième couche (16) comporte des particules (18) constituées d'un alliage MCrAlY, des particules abrasives (20) et un liant. La composition du métal d'apport et de l'alliage MCrAlY sont adaptées l'une à l'autre de manière telle que la chauffe du revêtement (10) appliqué par brasage engendre une dissolution au moins partielle des particules (18) constituées d'un alliage MCrAlY dans le métal d'apport liquide, avant la fusion de l'alliage MCrAlY.

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