Design, Engineering and Reconstruction of Gas Turbine Hot Parts (Blade and Combustion Chamber) – Remaining Useful Life Estimation, Rejuvenation and Repair

Application:

Cleaning and removing the coating

Cleaning is usually done before the inspection and before and after the repair and reconstruction operation by two chemical and mechanical methods.

Life estimation

Estimating and increasing the life of gas turbine parts that are made of super alloy due to critical working conditions of high temperature and stress is very important, especially in the case that the turbine is opened and taken apart for periodic maintenance.

Rejuvenation heat treatment

By working the piece at high temperature, the dimensions and shapes of Γ' deposits change and also a brittle layer of carbides is created along the grain boundary, which will reduce the toughness and creep resistance. By increasing the temperature up to the dissolution temperature of the Γ ′ phase, these deposits return to their original state, and rapid cooling prevents the formation of Γ ′ deposits.

Reconstruction by welding

Welding is used to repair cracks.

Reconstruction by brazing

The advanced brazing method provides the possibility of rebuilding parts of the turbine that are not possible according to the usual methods.

Coating

If needed, the recoating of the blades should be done using hvof or aps processes.


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Product Introduction:

When a blade or combustion chamber of a gas turbine works at high temperature, it can suffer from various damages. These damages may be physical or related to the microstructure. Therefore, over time, the piece loses its initial efficiency. The gas turbine parts are repaired in different stages, during which the metallurgical and dimensional properties of the parts are restored.

In general, the fixed and moving components of a gas turbine are subject to these damages:

* External physical damage: External damage includes fatigue cracks, surface oxidation and corrosion, FOD and abrasion.

* Internal microstructural damage: Internal microstructural damage also includes the dissolution of carbides in the grain boundary, change in phase, change in grain size and the structure of nickel-based superalloy, which can be solved by rejuvenation heat treatment.

Company

Type

This product is a final B2B service.

SKU: 11017 Category: 
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