Taking the short process smelting of round steel in the EAF of Zhangxuan Technology as the research object,the causes of single and multiple small crack defects,single and multiple slender crack defects,and multiple severe long crack defects in hot top forging of round steel were analyzed,and the production process based on the causes of defects were optimized.Through inspection and analysis,it was found that the defects of single and multiple small cracks in hot top forging were caused by the entrainment of the mold flux during the continuous casting process.Single and multiple slender strip defects were caused by bubble defects in the casting billet.Multiple severe long crack defects were caused by slab crack defects.Optimization was carried out on the electric furnace,LF refining and continuous casting smelting process based on the causes of defects,which effectively reduced the occurrence of slag entrapment defects,billet bubble defects,and billet crack defects.No hot top forging cracks were found after process optimization,and the qualification rate of hot top forging was significantly improved,which was close to 100％.
关键词
热顶锻/圆钢/开裂/气泡/卷渣
Key words
hot top forging/round steel/cracking/bubble/slag entrapment
维普
万方数据