Author(s)

Dakwa Yusufu Kwa, Joseph Olatunde Borode, Itopa Monday Momoh

Department of Metallurgical and Materials Engineering, Federal University of Technology-Akure, Akure, Nigeria.
Department of Research and Development, Engineering Materials Development Institute, Akure, Nigeria.

When joining ductile iron by submerged arc welding technique, a suitable welding speed and current, among other fac- tors, need to be skillfully put in place so as to enhance good welding. This work is based on microstructural examina- tion of preheated ductile iron at various temperatures ranging between 100°C - 400°C. Optical microscope was used for the microstructure analysis. The result shows varied complex microstructures at the fusion zone, un-mixed zone, par- tially melted zone and at the heat affected zone.

Submerged Arc Welding; Fusion Zone; Un-Mixed Zone; Heat Affected Zone

D. Kwa, J. Borode and I. Momoh, "Weldability Assessment of Preheated Ductile Iron Microstructures," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 10, 2012, pp. 1000-1004. doi: 10.4236/jmmce.2012.1110102.