Quality Defect Analysis and Controlled Strategies of H Beam

The web crack,web pits,rotten steel flange and the R corner cracks of H-shaped steel beam blank rolling surface were tested by optical microscope observation,SEM observation and energy spectrum;the crack formation mechanism was also analyzed by means of ANSYS simulation of temperature field after profiled billet cogging.It is considered that H beam web crack formation is mainly related to the longitudinal angle beam blank R;the web surface is mainly connected with subcutaneous bubbles and furnace heating system;and black steel flange is mainly concerned with mould power;R corner cracks are related to large differences in stress caused by BD-Ur-E-Uf large temperature gradient in the rolling process.Measures were proposed accordingly.