Weldability Assessment of Preheated Ductile Iron Microstructures

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.

DOI: 10.4236/jmmce.2012.1110102                

Abstract

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.

Keywords

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

Conflicts of Interest

The authors declare no conflicts of interest.

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