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SICAK DALDIRMA YÖNTEMİ İLE ALÜMİNYUM KAPLANAN ÇELİK MALZEMELERDE YÜKSEK SICAKLIK OKSİDASYONUNUN İNCELENMESİ

THE INVESTIGATION OF HIGH TEMPERATURE OXIDATION IN ALUMINIUM COATINGS USING HOT DEEP METHOD ON STEEL MATERIALS

Journal Name:

  • Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi

Publication Year:

  • 2009

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, the surface of SAE 1020 and AISI 316 were applied to aluminium (Al) coating by hot deep method. The oxidation resistance and microstructures were investigated of Al coating applied to the surface of different steels. Sample surfaces were coated with Al at the temperature of 750 °C in 10 minutes durations. Experimental samples were subjected to at the 800 °C temperature and diffusion tempering with 1 and 6 hours durations. The changes in the thickness of diffusion layer and microstructure of the surface, as a result of the processes applied, were examined. Weight variations in the samples oxidized in atmospheric conditions under the temperature of 900 °C with varying durations have also been measured. It was found that steel material which changes of little weight of the samples coated with Al resisted more than without coated Al for oxidation. It was indicated that coated with Al surface of steel protected from oxidation The changes of elements Fe, C, Al, Ni and Cr were investigated by microprobe analyses in surface region.
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Abstract (Original Language): 
Bu çalışmada, genel yapı çeliği (Ç1020) ve paslanmaz çelik (AISI 316) malzemelerin yüzeyine sıcak daldırma yöntemiyle alüminyum (Al) kaplama uygulanmıştır. Yüzeyde oluşan Al kaplamanın mikroyapısı incelenerek, yüksek sıcaklık oksitlenmesine karşı gösterdiği direnç incelenmiştir. Numuneler 750 °C’deki sıvı Al içinde 10 dakika süreyle bekletilerek yüzeyleri Al ile kaplanmıştır. Daha sonra bu numunelere 800 °C sıcaklıkta 1 ve 6 saat süre ile nötr ortamda difüzyon tavlaması uygulanmıştır. Elementlerin difüzyonu, difüzyon tabakası kalınlığı ve oksitlenmeye karşı gösterdiği direnç incelenmiştir. Al kaplama yapılan ve yapılmayan numuneler 900 °C sıcaklıkta ve farklı sürelerde yüksek sıcaklık oksidasyonuna maruz bırakılarak yüzeyde oluşan ağırlık değişimleri ölçülmüştür. Al kaplanmış çelik numunelerde önemli miktarda ağırlık değişimi olmaması, Al kaplamanın çeliği oksitlenmeden koruduğunu göstermiştir. Malzemelerin bileşimindeki Fe, C, Al, Ni ve Cr elementlerinin Al kaplama ve difüzyon tabakasındaki değişimleri mikroprob analizi ile incelenmiştir.
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