EFFECT OF HOT COIL BANDED STRUCTURE ON THE WELD DEFECT OF HF ERW PROCESS

摘要

In this study, the effects of chemical compositions on the weld defect formation in the hot rolled medium carbon steel prepared by the high frequency electric resistance welding were investigated. Upon U-bending test of the weldments, cracks were initiated either in die bond line or along the metal flow line. The crack initiation site was influenced more by the chemical compositions of the sample than by the welding conditions.