SÜRTÜNME KAYNAĞI İLE BİRLEŞTİRİLEN SONDAJ BORULARININ YORULMA DAVRANIŞLARI

Sondaj endüstrisinde kullanılan çelik borular servis şartlarında farklı yükler altında kullanılmaktadırlar. Bu çalışmada; N80-N80 aynı cins ve N80-42CrMo4, N80-S355J2 farklı cins çelik borular sürtünme kaynak yöntemi ile birleştirilmiştir. Birleştirmelerin yorulma davranışları araştırılarak, bulgular sertlik değerleri ve çekme dayanımı ile beraber değerlendirilmiştir. Sürtünme kaynaklı birleştirmelerin yorulma davranışlarının artan çekme dayanımı ve sertlik ile iyileştiği bulunmuştur.

FATIGUE BEHAVIOURS OF FRICTION WELDED DRILL PIPES

The drilling pipes are used under the different load in the service condition. In this study, N80-N80 similar drill pipes and N80-42CrMo4, N80-S355J2 dissimilar steel pipes were welded with friction welding process. The fatigue behavior of welded samples was investigated and the results were interpreted by considering the hardness values and tensile strength. It was found that the fatigue behaviour of friction welded samples recovered by the increasing tensile strength and hardness.

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