ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2018, Vol. 39 ›› Issue (1): 51-53.

所属专题: 模具钢

• 工艺技术 • 上一篇    下一篇

100t EAL-LF-VD-Φ500mm铸坯流程4Cr5MoSiV1模具钢的生产实践

吕安明,刘鹏,刁峰,闻小德   

  1. 山钢股份莱芜分公司特钢事业部,莱芜 271104
  • 收稿日期:2017-09-05 出版日期:2018-02-01 发布日期:2022-07-01
  • 作者简介:吕安明(1986-),男,工程师,2009年内蒙古科技大学(本科)毕业,炼钢、连铸工艺研究。

Commercial Production Practice of Die Steel 4Cr5MoSiV1 by 100t EAF-LF-Φ500mm Bloom Casting Flowsheet

Lü Anming,Liu Peng,,Diao Feng ,Wen Xiaode   

  1. Special Steel Department, Laiwu Branch, Shandong Iron and Steel Corp Ltd, Laiwu 271104
  • Received:2017-09-05 Published:2018-02-01 Online:2022-07-01

摘要: 生产的4Cr5MoSiV1钢(/%:0.3~80.40C,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-100t EAF-LF-VD-Φ500mm坯连铸-Φ120mm圆钢轧制。通过控制EAF终点[C]0.06%~0.10%,终点[P]0.006%,出钢加1kg/t铝块预脱氧,LF精炼渣碱度2.5~3.0,喂钙线后软吹≥10min,VD≤67Pa,100×2L/min氩气搅拌≥15min,中间包钢水过热20~30℃,连铸结晶器电磁搅拌(310A,1.5Hz),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。

关键词: 模具钢4Cr5MoSiV1, 100t EAL-LF-VD-Φ500 mm坯连铸 , 生产实践

Abstract: The process flowsheet of commercial-produced steel 4Cr5MoSiVl (/% : 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, 0.015~0.025 Alt) is 65% hot metal +35% scrap-100 t EAF-LF-VD-Φ500mm bloom casting. With the process measures including controlling EAF end [C]0.06%~0.10% and end [P]0.006% , pre-deoxidizing by adding 1kg/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 x2 L/min for ≥15 min, 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 [ N ] in 10 heats of steel 4Cr5MoSiVl is respectively 10 x 10-6 ~ 12 x 10 -6, 72 x 10-6 ~ 80 x 10-6 and 1. 2 x 10-6〜1.4 x 10-6 , and each index of steel all meet the requirement of specification.

Key words: Die Steel 4Cr5MoSiV1, 100t EAF-LF-VD-Φ500mm bloom Casting, Production Practice