Al7039 Zırh Alaşımının Yeniden Üretim Parametrelerinin Belirlenmesi

Bu çalışmada, günümüzde zırh malzemesi olarak bilinen Al7039 alaşımının, yeniden üretilebilirliği ve üretim parametrelerinin belirlenebilirliği üzerinde durulmuştur. Ticari olarak elde edilen Al7039 alaşımlı plakalar, döküm fırınında ergitilerek, özel olarak hazırlanmış kalıp içerisine dökülmüştür. Uygulanan basınç ile kalıp içerisinde sıkıştırılan numuneler, farklı soğuma hızlarında soğutularak, uygun döküm sürecinin belirlenmesi için incelenmiştir. Genellikle döküm sonrasında uygulanan homojenleştirme ısıl işlemi parametreleri belirlendikten sonra, sıcak dövme işlemine geçilmiştir. 15mm kalınlıktan 6mm kalınlığa düşürülen yeni üretim plakalar, bu işlem sonrasında çözeltiye alma ve suni yaşlandırma ısıl işlem parametrelerinin belirlenmesi ile kullanılabilir hale getirilmiştir. Her üretim aşamasında alınan mikro yapı görüntüleri ve uygulanan mekanik testler incelenerek değerlendirilmiştir.

Anahtar Kelimeler:

Al7039 alaşımı, döküm

Determination of Remanufacturing Parameters of Al7039 Armor Alloy

In this study, the determinability of the remanufacturing parameters of Al7039 alloy, nowadays known as armor material, are emphasized. Commercially obtained Al7039 alloy plates are melted in a casting furnace and cast into a specially prepared mold. After the mold pressure cap is closed, the samples are squeezed into the mold with a pressure of about 18 MPa. Plates were examined by cooling at different cooling rates in order to determine the proper casting process. After the homogenization heat treatment parameters which are generally applied after casting were determined, hot forging process was started. After waiting at 400 oC temperature for 15 minutes, the plates decreased from 15 mm thickness to 6 mm thickness and cooled in the air after the process. In the heat treatment process, which is another of the production processes, the samples were made available by specifying the parameters of heat treatment, solution, quenching and artificial aging. The microstructure images taken at each stage of production and the applied mechanical tests were examined and evaluated.

Keywords:

Al7039 alloy, casting,

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