10Cr21Mn16NiN不锈钢冶炼与连铸生产实践  

Smelting and Continuous Casting Practice of Stainless Steel 10Cr21Mn16NiN

作　　者：张增武[1] Zhang Zengwu(No.2 Steelmaking Plant of Shanxi Taigang Stainless Steel Co.Ltd,Taiyuan 030003)

机构地区：[1]山西太钢不锈钢股份有限公司炼钢二厂,太原030003

出　　处：《特殊钢》2020年第3期47-50,共4页Special Steel

摘　　要：通过对10Cr21Mn16NiN高氮不锈钢冶炼和连铸工艺研究,在生产中改进两步法冶炼和连铸生产工艺,与三步法工艺相比,LF精炼后期增氮速度由5×10^-6~10×10^-6/min提高到20×10^-6~30×10^-6/min,LF精炼时间由390 min缩短至240 min,连铸等钢时间由4 h降至2 h以下;解决了钢包增氮炉渣外溢的问题;避免了方坯在连铸过程中的翘头,No.1、No.2流断浇率由开发时100%降至0,设备事故率由66.7%降至0,2炉连浇率实现100%。实践证明,方坯连铸机辊子非密排且仅有1台五辊拉矫机也能生产出高强不锈钢方坯。Compare with the three-step method,through the study of smelting and continuous casting of High-Nitrogen stainless steel 10Cr21Mn16NiN,the two-step smelting and continuous casting technology has been optimized,the adding nitrogen rate is raised from 5 × 10^-6~10 ×10^-6/min to 20 × 10^-6~30 × 10^-6/min in later stages of LF,the LF refining time is shortened from 390 min to 240 min,the CCM steel waiting time is reduced from 4 h to 2 h;it solves the problem of slag spilling during the nitrogen adding;it also avoids the billet buckling during continuous casting,the breakage rate of No.1 &No.2 casting strand reduces from 100% to 0,the equipment accident rate decreases from 66.7% to 0,to achieve 100% 2-heats sequence casting.The practice shows that the billet casting without closely spaced rolls can produced High-Nitrogen stainless steel even though with only one five-high withdrawing and straightening machine.

关 键 词：高锰高氮不锈钢10Cr21Mn16NiN 增氮 溢渣 翘头 方坯连铸 

分 类 号：TF764.1[冶金工程—钢铁冶金] TF777