超低氧钢20CrMOH和60Si2MnA中TiN夹杂的控制  

Control of TiN Inclusion in Ultra-low Oxygen Steel 20CrMoH and 60Si2MnA

作　　者：李海波[1] 王郢[1] 王新华[1] 王万军[1] 张玮[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]首钢技术研究院,北京100041

出　　处：《特殊钢》2008年第2期44-46,共3页Special Steel

摘　　要：研究了超低氧(10×10^(-6))钢20CrMoH和60Si2MnA转炉终点[C]和LF渣(TiO_2)对转炉终点[Ti]和LF精炼过程△[Ti]的影响,以及[S]、[N]对TiN生成的影响。结果表明,试验钢TiN夹杂有两类:(1)单独TiN;(2)CaS为核心的复合TiN。20CrMoH钢中TiN夹杂较少,60Si2MnA钢中TiN占夹杂总量的50%～60%。随铸坯中S含量的增加,TiN夹杂含量增加;当[Ti]为(69～80)×10^(-6),[N]、[S]分别从(60～74)×10^(-6)和(30～35)×10^(-6)降至(27～35)×10^(-6)和(14～20)×10^(-6)时,TiN个数从4.4～6.1个/cm^2降低到0.4～1.1个/cm^2;当[S]≤0.002%,钢中无CaS-TiN复合夹杂析出。The effect of converter end [ C ] and （ TiO2 ） in LF slag on converter end [ Ti ] and A [ Ti ] during LF refining process, as well as the effect of [ S ] and [ N ] on formation of TiN in ultra-low oxygen （ [ O ] 10 × 10^-6 ） steel 20CrMoH and steel 60Si2MnA have been studied. Results showed that there were two kinds of TiN inclusion： （ 1 ） individual TiN and （2） compound TiN with core of CaS; TiN was minor in inclusions in steel 20CrMoH, but TiN accounted for 50% - 60% of total inclusions in steel 60Si2MnA; with increasing S content in cast billet the TiN content increased; as [ Ti] was （69 -80） × 10^-6, [ N] and [S] respectively decreased from （60 ～74） ×10^-6 and （30 -35） × 10^-6 to （27～ 35） ×10^-6 and （14 ～20） ×10^-6, the TiN number decreased from 4.4 ～6.1 per cm2 to0.4 ～1.1 per cm2; and as [S] ≤0. 002%, there was no CaS-TiN compound inclusion precipitated in steel.

关 键 词：超低氧 20CRMOH钢 60SI2MNA钢 TIN 工艺控制 

分 类 号：TF762[冶金工程—钢铁冶金]