HAKAN ADA, SİNAN AKSÖZ, TAYFUN FINDIK, Cemil ÇETİNKAYA, BÜLENT BOSTAN, İlhan CANDAN

API 5L X65 Çeliklerinin MAG Kaynak Yöntemi ile Birleştirilmesinde, Kaynak İşleminin Mikroyapı ve Mekanik Özelliklere Etkisinin İncelenmesi

Bu çalışmada; doğalgaz ve petrol boru hatlarında kullanılan API 5L X65 kalitesindeki çelik malzemeler, MAG kaynak yöntemiyle özlü rutil tel ile birleştirilmiştir. Birleştirmelerden alınan numunelerin mikroyapı ve mekanik özelliklere etkileri incelenmiştir. Deneysel çalışmalarda makro ve mikroyapısal olarak, ana malzeme, ITAB) ve kaynak metali incelenmiş, oluşan yapıların tipik kaynak işlem özelliklerine sahip yapılar olduğu tespit edilmiştir. Çekme, çentik darbe, sertlik ve eğme testlerinde kaynak işlemi kusursuz özellikler sergilemiştir. Elde edilen tüm sonuçlar, kaynak işleminin mikroyapısal ve mekanik olarak kendinden beklenen lokal özellikleri karşılayabilecek bir tavır sergilediğini göstermiştir.

The Investigation of Effect of Welding Process on The Microstructure and Mechanical Properties of API 5L X65 Steel Welded with Gas Metal Arc Welding Method

In this study, API 5L X65 steel pipes, used in natural gas and oil pipelines, was welded by the FCAW method using rutile flux-cored wire electrodes. The microstructure and mechanical properties of the samples were investigated. In the experimental studies, the microstructure of main material, HAZ and FZ was examined. It was determined that the formed structures were typical characteristic structures for medduring welding process. Welding process demonstrated perfect features in tensile, charpy impact, hardness and guided bend tests. All results obtained from experimental studies have showed that the welding process exhibits expected local properties as microstructural and mechanical.

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