Elektrik direnç nokta kaynağı ile birleştirilen yüksek mukavemetli çeliklerin mekanik özelliklerinin incelenmesi

Yıl 2018, Cilt: 24 Sayı: 1, 63 - 68, 27.02.2018

Sedat Aras Rukiye Ertan Hande Güler Özgül

Öz

Bu
çalışmada farklı kalınlıklardaki DP 800, Usibor 1500 ve Ductibor 500P olmak
üzere üç farklı yüksek mukavemetli çelik sac malzeme elektrik direnç nokta
kaynağı ile birleştirilmiştir. Kaynak işlemi elektrik akımı, basıncı ve süresi
gibi sabit parametreler altında farklı malzeme kombinasyonlarında yapılmıştır.
Aynı ve farklı malzeme çiftleri için bindirme şeklinde elektrik direnç nokta
kaynağı uygulanarak standartlara uygun çekme numuneleri hazırlanmıştır.
Bağlantıların mekanik özellikleri sertlik ve çekme-makaslama testleri ile
değerlendirilmiştir. Elde edilen sonuçlar Ductibor 500P malzemenin kaynak
sonrasında en yüksek mukavemet ve sertlik değerlerine sahip olduğunu
göstermiştir. Ayrıca farklı tür çelikler birbirileriyle kaynak edildiğinde
ulaşılan maksimum çekme-makaslama kuvveti ve uzama miktarı aynı tür malzemelere
göre daha yüksek değerlerde elde edilmiştir.

Anahtar Kelimeler

DP 800, Usibor 1500, Ductibor 500P, Elektrik direnç nokta kaynağı, Vickers sertlik testi, Çekme-makaslama testi

Investigation of mechanical properties of high strength steel welded by resistance spot welding

Öz

In
this study, DP 800, Usibor 1500 and Ductibor 500P three different high strength
steel sheet materials with different thicknesses were joined with electrical
resistance spot welding. Welding process is carried out in different material
combinations under constant parameters such as electric current, pressure and
duration. Tensile specimens for the same and different material pairs welded by
resistance spot welding in the form of overlay were prepared according to the
standards. Mechanical properties of the welded specimens were evaluated by
hardness and tensile-shear tests. The results show that Ductibor 500P material
has the highest strength and hardness values. Furthermore, when different types
of steels are welded together, the maximum tensile-shear force and elongation
achieved are higher than those of the same type of materials.

Anahtar Kelimeler

DP 800, Usibor 1500, Ductibor 500P, Resistance spot welding, Vickers hardness, Tensile-shear test

Kaynakça

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