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Formation of delamination defects in steel strip and its effect on steel pipe quality
- Dec 29, 2017 -

The stratification is caused by the shrinkage defects of the ingot. The middle section of the steel plate rolled by ingot with shrinkage cavity is easy to occur stratification.The inner layer of the wide plate can be exposed to the edge of the strip after longitudinal shearing, but it is not easy to find.

The layered defects are obviously exposed in the process of forming and welding, resulting in large longitudinal cracks and even not welding.

The delamination defects can be detected by ultrasonic flaw detection.