摘要
利用全相显微镜及扫描电镜,对河钢唐钢不锈钢公司转炉-连铸流程生产的Q235B钢的冷弯开裂现象进行了分析,认为开裂处存在着的大颗粒硫化物和氧化铝系夹杂是导致缺陷的主要原因。通过控制入炉铁水硫含量、优化转炉炉后钢包渣、采用加Al脱氧、延长静吹时间、采用钢包吹氩搅拌、更换氩气吹扫管等改善措施,Q235B钢中夹杂数量明显降低,质量得到有效提升,可降低生产成本约32元/t钢。
The cold bending cracking of Q235B steel produced in the converter-continuous casting of Tangshan Stainless Steel Company of HBIS was analyzed by means of full-phase microscope and scanning electron microscope. It was considered that the main cause of the defect was the existence of large-grained sulphide and alumina inclusions in the crack. The inclusion defects are obviously reduced through measures of s controlling sulphur content in hot metal, optimizing slag of ladle after converter, adding Al to deoxidize, prolonging static blowing time, using ladle argon blowing stirring and replacing argon blowing pipe. The quality is improved effectively and production cost is decreased by about 32 yuan/t steel.
作者
赵艳
Zhao Yan(Technical and Quality Department of HBIS Group Tangshan Stainless Steel Company,Tangshan, Hebei, 063016)
出处
《河北冶金》
2019年第10期58-61,53,共5页
Hebei Metallurgy
关键词
转炉-连铸
Q235B
夹杂
硫化物
氧化铝
吹氩
converter-continuous casting
Q235B
inclusion
sulfide
alumina
argon blowing
