100t EAL-LF-VD-Φ500 mm铸坯流程4Cr5MoSiV1模具钢的生产实践  

Commercial Production Practice of Die Steel 4Cr5MoSiV1 by 100 t EAF-LF-VD-Φ500 mm Bloom Casting Flowsheet

作　　者：吕安明 刘鹏 刁峰 闻小德 

机构地区：[1]山钢股份莱芜分公司特钢事业部,莱芜271104

出　　处：《特殊钢》2018年第1期51-53,共3页Special Steel

摘　　要：生产的4Cr5MoSiVl钢(/%:0.38~0.40C,0.88~0.92Si,0.42~0.44Mn,0.001~0.003S,0.007~0.014P,5.00~5.55Cr,1.37~1.40Mo,0.98~1.00V,0.015~0.025Alt)的工艺流程为65%铁水+35%废钢-100 t EAF-LF-VD-Φ500 mm坯连铸-Φ120 mm圆钢轧制。通过控制EAF终点[C]0.06%~0.10%,终点[P]0.006%,出钢加1 kg/t铝块预脱氧,LF精炼渣碱度2.5~3.0,喂钙线后软吹≥10 min,VD≤67 Pa,100×2 L/min氩气搅拌≥15min,中间包钢水过热20~30℃,连铸结晶器电磁搅拌(310 A,1.5 Hz),保护浇铸,拉速0.34~0.35 m/min等工艺措施,10炉4Cr5MoSiVl钢中[O],[N]和[H]分别为10×10^(-6)~12×10^(-6),72×10^(-6)~80×10^(-6),1.2×10^(-6)~1.4×10^(-6),各项指标均满足协议要求。The process flowsheet of commercial-produced steel 4CrSMoSiV1 （/% ：0. 38 - 0.40C, 0. 88 - 0. 92Si, 0.42 -0. 44Mn, 0. 001 -0. 003S, 0. 007 -0. 014P, 5.00 -5.55Cr, 1.37 - 1.40Mo, 0. 98 - 1.00V, 0. 015 -0. 025Ah） is 65% hot metal ＋ 35% scrap- 100 t EAF-LF-VD-Ф500 mm bloom casting. With the process measures including control- ling EAF end [ C ] 0. 06% -0. 10% and end [ P]O. 006%, pre-deoxidizing by adding 1 kg/t aluminium block during tapping, controlling LF refining slag basicity 2. 5 - 3.0, soft argon stirring for ≥ 10 min after feeding calcium wire, VD ≤67 Pa, argon stirring with 100 ×2 L/min for ≥15 rain, supper heat extent of liquid in tundish 20 -30 ℃, casting mold electromagnetic stirring with 310 A and 1.5 Hz in casting, shielding casting and casting speed 0. 34 -0. 35 m/min, the [ O], [ N] and IN] in 10 heats of steel 4CrSMoSiV1 is respectively 10 ×10^-6 - 12 ×10^-6, 72 ×10^-6- 80×10^-6 and 1.2×10^-6 - 1.4 ×10^-6 and each index of steel all meet the requirement of specification.

关 键 词：模具钢4Cr5MoSiV1 100 t EAL-LF—VD—Ф500 mm坯连铸 生产实践 

分 类 号：TF777[冶金工程—钢铁冶金]