This standard specifies the infiltration layers (aluminized layer, aluminum chromium infiltrated layer, aluminum silicon infiltrated layer, aluminum titanium infiltrated layer, aluminum cobalt infiltrated layer, aluminum chromium-aluminum silicon infiltrated layer and nickel chromium infiltrated layer) of aircraft engine turbine blades (hereinafter referred to as blades). - Chromium aluminum infiltration layer, etc.) general requirements, inspection methods, quality requirements and corresponding metallographic pictures of the infiltration layer. This standard is applicable to the metallographic examination of the seepage layer on the surface of aeroengine turbine blades.
HB 20113-2012 history
2013HB 20113-2012 Metallographic examination for coatings of aero-engine blade