摘要
山东钢铁股份有限公司莱芜分公司通过控制电炉终点碳在0．12%-0．25％；LF精炼渣碱度B=3．0；VD炉真空度小于67Pa保持时间大于25min；连铸采用氩气密封水口保护浇铸；过热度控制在（20±5）℃；结晶器电磁搅拌电流I=200A、频率F=3Hz；同时采用动态二冷配水技术，成功开发的4130连铸圆坯[O]≤20ppm，[N]≤80ppm，[H]≤2ppm；低倍组织≤1．0级；锻件夹杂物A、B≤1．0级，C、D、Ds≤0．5级；锻件超声波探伤≥3级；圆坯的尺寸、外形以及碳偏析等各项指标均满足了石油套管连接件用钢技术要求。
Shandong iron and steel Limited by Share Ltd Laiwu branch developed the 350mm diameter 4130 round billet continuous casting, by using the following technical measures： control the end point carbon of electric furnace in 0.12%-0.25%; LF refining slag basicity B=3.0; Keep the time more than 25 minutes, when the vacuum degree of VD furnace is less than 67 Pa; Using argon sealing nozzle protective casting; control the superheat of molten steel in （20 ＋ 5）~C; control the electromagnetic stirring of crystallizer/--200 A, F=3 Hz; using the Two dynamic cooling section water distribution technique etc. The product technical indicators, such as [O] ≤ 20 ppm,[N] ≤80 ppm,[H] ≤ 2 ppm, Maerostrueture level ≤ 1.0, A＆B class of non metallic inclusions ≤ 1.0, C＆D＆Ds class of non metallic inclusions ≤0.5, The size, shape and carbon segregation of round billet etc. all meet the quality requirements of oil casing connector user.
出处
《冶金标准化与质量》
2014年第6期14-18,共5页
Metallurgical Standardization & Quality
