Microstructural Investigation of SPA-C Steel Sheets Used in Railway Vehicles in Resistance Spot Welding

Akkas N., Ferik E., Kilic R., Ilhan E., Aslanlar S.

3rd International Multidisciplinary Microscopy and Microanalysis Congress (InterM), Oludeniz, Türkiye, 19 - 23 Ekim 2015, cilt.186, ss.77-82 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 186
  • Doi Numarası: 10.1007/978-3-319-46601-9_9
  • Basıldığı Şehir: Oludeniz
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.77-82
  • Marmara Üniversitesi Adresli: Hayır

Özet

This paper presents an experimental study on resistance spot welding of SPA-C steel sheets used in side wall and roof in rail vehicles. SPA-C steel sheets having 2.3 mm thicknesses were joined by using resistance spot welding as lap joint. A timer and current controlled resistance spot welding machine having 120 kVA capacity and a pneumatic application mechanism with a single lever was used to prepare the specimens. Welding periods were chosen as 5, 10, 15, 20, 25 and 30 cycles and also welding currents were increased from 6 kA up to 14 kA by rise of 0.5 kA. The electrode force was kept constant at 6 kN. The micro and macro-structures of prepared welding specimens were investigated by means of an optical microscope and scanning electron microscope (SEM) in order to see the joinability of SPA-C steel sheets by resistance spot welding.