Analysis of weld crack of spherical hinge support ear plate in Egang 130t converter

The welding seam cracking of the supporting bolt support ear plate in a converter of Egang is repeated, and the joint shaft between the ear plate and the supporting bolt is often worn. Based on field test and finite element simulation analysis, the causes of weld cracking are analyzed deeply. The results show that due to the large angular acceleration in the process of steelmaking, the impact will induce the cracking of weld stress concentration. According to the research results, a series of measures to reduce the impact are put forward, which can effectively curb the occurrence of weld crack failure.