COATING PROCESS FOR APPLYING A BIFURCATED COATING

A coating process for applying a bifurcated coating to an article is disclosed including applying an aluminizing slurry to a first portion of the article, applying a chromizing slurry to a second portion of the article, and simultaneously heat treating the article, the aluminizing slurry, and the ch...

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Bibliographische Detailangaben
Hauptverfasser:	THOMPSON, Christopher, Edward, WANG, Limin, ZHANG, Liming
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION WEAPONS
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Beschreibung
Zusammenfassung:	A coating process for applying a bifurcated coating to an article is disclosed including applying an aluminizing slurry to a first portion of the article, applying a chromizing slurry to a second portion of the article, and simultaneously heat treating the article, the aluminizing slurry, and the chromizing slurry. Heat treating the aluminizing slurry forms an aluminide coating on the first portion of the article and an aluminide diffusion zone between the article and the aluminide coating. Heat treating the chromizing slurry forms a chromide coating on the second portion of the article and a chromide diffusion zone between the article and the chromide coating. The first portion and the second portion are both maintained in an unmasked state while applying the aluminizing slurry and the chromizing slurry and during the heat treating. L'invention porte sur un procédé de revêtement consistant à appliquer un revêtement bifurqué sur un article, lequel procédé comprend l'application d'une suspension d'aluminisation sur une première partie de l'article, l'application d'une suspension de chromage sur une seconde partie de l'article et le traitement thermique simultané de l'article, de la suspension d'aluminisation et de la suspension de chromage. Le traitement thermique de la suspension d'aluminisation forme un revêtement d'aluminure sur la première partie de l'article et une zone de diffusion d'aluminure entre l'article et le revêtement d'aluminure. Le traitement thermique de la suspension de chromage forme un revêtement de chrome sur la seconde partie de l'article et une zone de diffusion de chrome entre l'article et le revêtement de chrome. La première partie et la seconde partie sont toutes deux maintenues dans un état non masqué lors de l'application de la suspension d'aluminisation et de la suspension de chromage, ainsi que pendant le traitement thermique.