S32205 Dubleks Paslanmaz Çeliğin TIG Kaynağında Soğuma Hızının Mikroyapısal Özelliklere Etkileri

Dubleks paslanmaz çeliklerin kaynağı artan uygulama alanlarından dolayı belirgin şekilde ilgi kaynağı olmaktadır. Bu çeliklerin kaynaklı bağlantılarında oluşabilecek delta-ferrit, östenit ve diğer önemli metaller-arası fazların uygun olmayan dağılımları ile ilgili problemler önem kazanmaktadır. Kaynak işlemlerinde tatminkar korozyon ve mekanik özellikleri elde edebilmek için optimum delta ferrit oranları hacimce yaklaşık olarak %35-60 aralığında olması gerekmektedir.Bu çalışmada 3 mm kalınlığındaki 2205 dubleks paslanmaz çelik numuneler saf argon koruyucu gazı kullanılarak TIG kaynak yöntemi ile birleştirilmiştir. Farklı kaynak soğuma koşullarının mikroyapısal değişikliklere etkileri incelenmiştir.

Anahtar Kelimeler:

Dubleks Paslanmaz Çelikler, TİG Kaynağı, Soğuma Hızı Etkileri

S32205 Dubleks Paslanmaz Çeliğin TIG Kaynağında Soğuma Hızının Mikroyapısal Özelliklere Etkileri

Welding of duplex stainless steels gains interest, significantly due to their increasing application fields. The problems come into question about the weldments of these steels improper distribution of important phases like delta-ferrite, austenite and other intermetallics. In order to maintain sufficient corrosion and mechanical properties in welding, the optimum delta-ferrite phase ratios must be kept within approximately %35-65 by volume. In this study; thicknesses of 3mm S32205 (2205) duplex stainless steel plates were TIG welded by pure argon shielding gas. The effects of various welding cooling circumstances on microstructural developments were examined.

Keywords:

Duplex Stainless Steels, TIG Welding, Cooling Rate Effects,

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