Abstract
The transverse crack, a type of cold crack, occurs perpendicular to the welding direction. From experience, preheating and interpass temperature are important factors in cold crack occurrence. Transverse cracks were detected in the specimen welded with 70°C preheat and an interpass temperature below 30°C; cracks were detected 9·5–14 mm away from the weld surface. Hardness values of preheating 70°C and interpass temperatures below 30°C were higher than those of preheating 70°C and interpass temperatures 100–120°C in the deposited weld metal. The residual stress values for the specimen welded with 70°C preheat and an interpass temperature below 30°C were higher than those of the specimen welded at preheating 70°C and interpass temperatures 100–120°C. The weld cracks were detected in the area of the maximum residual stresses.
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