Method for manufacturing an abrasive coating on a gas...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 24/00 (2006.01) C23C 24/08 (2006.01) C23C 30/00 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2679517

The invention relates to a method for manufacturing an abrasive coating on a gas turbine component, especially on a gas turbine rotor blade tip, comprising at least the following steps: a) providing a gas turbine component, especially a gas turbine rotor blade; b) providing a high temperature melting alloy powder; c) providing abrasive particles; d) providing a low temperature melting alloy powder; e) blending at least said high temperature melting alloy powder and said abrasive particles to provide a mixture; f) applying said low temperature melting alloy powder and said mixture to an area of said gas turbine component, especially to a tip of said turbine rotor blade; g) locally heating said area of said gas turbine component to a temperature above the melting point of said low temperature melting alloy powder but below the melting point of said high temperature melting alloy powder.

L'invention porte sur un procédé de fabrication d'un revêtement abrasif sur un composant de turbine à gaz, notamment sur une pointe de pale de rotor de turbine à gaz. Le procédé consiste à a) se procurer un composant de turbine à gaz, notamment une pale de rotor de turbine à gaz ; b) disposer une poudre d'alliage à fusion à température élevée ; c) disposer des particules abrasives ; d) disposer une poudre d'alliage à fusion à température faible ; e) mélanger au moins la poudre d'alliage à fusion à température élevée et les particules abrasives pour fournir un mélange ; f) appliquer la poudre d'alliage à fusion à température faible et le mélange à une surface du composant de turbine à gaz, notamment à une pointe de la pale de rotor de turbine ; g) chauffer localement la surface du composant de turbine à gaz à une température supérieure au point de fusion de la poudre d'alliage à fusion à température faible mais inférieure au point de fusion de la poudre d'alliage à fusion à température élevée.

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