Patent · US Expired

Method for restoring the microstructure of a textured article and for refurbishing a gas turbine blade or vane

US6719853B2 · kind B2 · utility

3Cited by

8References

16Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Ralf Buergel · Melle, DE
Winfried Esser · Bochum, DE
Michael Ott · Wetter (Ruhr), DE
Der-Yan Frank Roan · Orlando, US

Key dates

Filing date	Apr 26, 2002
Grant date	Apr 13, 2004
Priority date	—
Expiry date	Apr 26, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T50/60
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

During a solution heat treatment grain recrystallization may occur of a textured article, especially at the surface rim. The present invention provides a method for restoring the microstructure of a textured article, such as a gas turbine engine blade, which comprises coating the surface of the article with a high temperature stable surface coating or by a controlled development of an oxide scale and subsequently performing a solution heat treatment, thereby maintaining said thermally stable surface coating.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.