Method for applying heat resistant protection components onto a surface of a heat exposed component

Patent metadata

Field	Value
Publication number	US-9452499-B2
Application number	US-201414488433-A
Country	US
Kind code	B2
Filing date	Sep 17, 2014
Priority date	Sep 20, 2013
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

The invention refers to a method for applying heat resistant protection components onto the surface of a heat exposed component. The method including providing at least two separate heat protection components, and joining the at least two separate heat protection components onto their top surface and/or bottom surface and/or at least one side surface by flexible means for obtaining an integrally handable entity. The method further includes fixing the integrally handable entity by applying and brazing the surface of each heat protection component on the surface of the heat exposed component. The materials of the flexible means and for joining the flexible means on the separate heat protection components are selected such that the materials withstand brazing being performed under protective atmosphere, i.e. an atmosphere without or with reduced amount of oxygen, at process temperatures between 700° C. and 1200° C., and that the materials are burned out after brazing during a following oxidizing thermal step.

First claim

The invention claimed is:

1. A method for applying heat resistant protection components with a surface onto a surface of a heat exposed component, the method comprising:
providing at least two separate heat resistant protection components;
joining surfaces of the at least two separate heat protection components together by a flexible material and fixing the flexible material with the heat protection components by an adhesive material for obtaining an integrally handable entity;
fixing the integrally handable entity by applying and brazing a surface of each heat protection component on the surface of the heat exposed component under an atmosphere without or with a reduced amount of oxygen, at process temperatures between 700° C. and 1200° C.,
wherein the flexible material withstands the brazing being performed under an atmosphere without or with a reduced amount of oxygen, at process temperatures between 700° C. and 1200° C., and
wherein the adhesive material withstands the brazing being performed under an atmosphere without or with a reduced amount of oxygen, at process temperatures between 700° C. and 1200° C.; and
burning out the flexible material and the adhesive material after the brazing during a following oxidizing thermal step.

2. The method according to claim 1 , wherein water steam is added during the oxidizing thermal step.

3. The method according to claim 1 , wherein in the joining of the at least two separate heat protection components, the flexible material is a net mesh that is applied and fixed at the at least two separate heat protection components at a side opposite to the surface that is to be in contact with the surface area of the heat exposed component.

4. The method according to claim 1 , wherein in the joining of the at least two separate heat protection components, a spacer-element is added between the at least two separate heat protection components being arranged side by side.

5. The method according to claim 1 , wherein the at least two separate heat protection components are plate-like and consist of ceramic material, the flexible material is made of carbon or of an organic compound carbonizing under vacuum braze conditions and the flexible material is fixed at the at least two separate heat protection components by a graphite or carbon paste.

6. The method according to claim 1 , wherein the brazing is performed under the atmosphere without oxygen.

7. The method according to claim 1 , wherein the brazing is performed under the atmosphere with the reduced amount of oxygen.

Assignees

• Alstom Technology Ltd
• General Electric Technology Gmbh

Inventors

• Bossmann Hans-Peter
• Stuer Michael
• Renusch Daniel

Classifications

• E04F13/0862

  composed of a number of elements which are identical or not, e.g. carried by a common web, support plate or grid · CPC title

• C04B2237/78

  Side-way connecting, e.g. connecting two plates through their sides · CPC title

• F05D2230/237

  Brazing · CPC title

• B23P15/02 Primary

  turbine or like blades from one piece · CPC title

• C04B37/026

  consisting of metals or metal salts · CPC title