File:Repair process for a V2500 high-pressure turbine guide vane.svg

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English: Eleven turbine blades samples that showcase the repair process developed by MTU engines to send damaged blades back into service. The blades shown are high-pressure internally-cooled turbine nozzle guide vanes (stators).
  1. Damaged blade before treatment
  2. After removal of cover and baffles, and stripping of thermal barrier coating
  3. After chemical stripping of bond coating (MCrAIY) and heat tint test
  4. After fluoride-ion cleaning [note that the fracture would disqualify the actual blade for re-use in an engine - this is a sample shown for demonstration purposes]
  5. After brazing process (cooling holes now filled)
  6. After recontouring by grinding and fluorescent penetrant inspection
  7. After vacuum plasma of the new bond coating (MCrAIY)
  8. After atmospheric plasma spraying of the thermal barrier coating
  9. After laser drilling of cooling holes
  10. After addition of cover and baffles, airflow check, and final inspection
  11. Close-up view of the finished, repaired nozzle guide vane
At the Paris Air Show 2013 where these blades were exhibited, MTU quoted a repair price of $1,700 per blade, which they compared to a quoted $12,300 price for the new part.
日本語: 損傷したV2500ja:ターボファンエンジンのタービン整流翼の修理工程

1:修復前の破損した整流翼
2:分解して熱被覆を除去
3:化学的に洗浄(MCrAIY)
4:フッ素イオンによる洗浄後(注:この写真の整流翼は損傷が激しいので再利用しない)
5:ロウ付け後 (冷却孔は塞がれている)
6:研削による整形と蛍光探傷
7:真空プラズマで新しい被覆を施す (MCrAIY)
8:大気圧プラズマで熱被覆を施す
9:レーザーで冷却孔をあける
10:カバーを追加して最終検査

11:修復された整流翼の仕上がりの拡大
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Source Own work
Author Olivier Cleynen

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