【摘要】 针对氧化物夹杂对高碳钢盘条深加工的不利影响,采用氧氮分析仪、金相显微镜对BOF—LF—CC生产各环节钢中的全氧含量及夹杂物形貌、成分、大小进行检测,分析其全氧含量和夹杂物的形态,找出钢中氧含量的变化规律和夹杂物主要成分及其形成原因。通过开展复吹转炉脱磷工艺研究,将复吹转炉最佳去磷温度设为1 400～1 500℃,根据造渣工艺,建立不同条件下操作模式,实现不同钢种的终点精确控制,有效防止钢水过氧化,减少脱氧剂的消耗和夹杂物的生成。将转炉无铝化终脱氧、精炼渣系和吹氩工艺优化,并在连铸过程全保护浇注,实现全过程洁净化生产,有效控制氧、氮含量,显著减少大型夹杂物,使盘条中氧质量分数的平均值控制在19.43×10-6,夹杂物级别低于0.5级,产品质量较好,满足金属制品企业的要求。更多还原

【Abstract】 Aiming at the negative influence of oxide inclusion in high carbon wire rod processing,the total oxygen content and inclusion morphology,composition and size in steel in BOF—LF—CC production each section was tested by using oxygen and nitrogen analyzer,metallographic microscope,its total oxygen content and inclusion morphology was analyzed,the change pattern of oxygen content in steel and inclusion main composition and its formation cause were found out.Through carry out combined blow converter dephosphorization process research,the optimum dephosphorization temperature was set 1 400~1 500 ℃,according to slagging process,the operation mode in different condition was established,the terminal precise control of different steel was realized,the molten steel peroxide was prevented effectively,the consumption of deoxidizer and production of inclusion were reduced.The process of converter final deoxidation without aluminum,refining slag system and argon blowing was optimized,the fact that full protection casting in continuous casting can realize overall clean production process,control oxygen,nitrogen content effectively,reduce large inclusion significantly,the average value of oxygen mass fraction in wire rod was controlled 19.43×10-6,inclusion grade was controlled lower than 0.5,product quality can meet the requirement of steel wire product companies.更多还原