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 ›› 2020, Vol. 41 ›› Issue (1): 55-57.

• 工艺技术 • 上一篇    下一篇

铸轧辊套用Φ700mm 32Cr3Mo1V钢连铸圆坯生产实践

李刚, 单文瑞, 许民, 陈树军, 张旭辉   

  1. 江苏永钢集团有限公司特钢事业部,张家港215628
  • 收稿日期:2019-08-29 出版日期:2020-02-01 发布日期:2022-04-20
  • 作者简介:李 刚(1983-),男,工程师,特钢事业部 副经理,2005年南京工业大学(本科)毕 业,特钢工艺研究及技术管理。

Production Practice of Φ700mm CC Round Bloom of Steel 32Cr3MolV for Casting Roll Shell

Li Gang, Shan Wenrui, Xu Min, Chen Shujun , Zhang Xuhui   

  1. Jiangsu Yonggang Group Co Ltd, Special Steel plant, Zhangjiagang 215628
  • Received:2019-08-29 Published:2020-02-01 Online:2022-04-20

摘要: 32Cr3Mo1V钢(/%:0.33~0.36C,0.20~0.50Mn,0.20~0.40Si,3.00~3.20Cr,0.30~0.45Ni,1.00~1.20Mo,0.19~0.22V,≤0.008P,≤0.005S,≤0.10Cu,≤0.01 Al)连铸圆坯生产工艺为110 t电弧炉-LF-VD-Φ700mm坯连铸。控制电弧炉出钢终点[C]≥0.08%、[P]≤0.004%,LF精炼终点渣(/%:50~60CaO,10~15Si02,15~25Al203,≤6MgO,ΣFeO+MnO≤0.8%,VD后[H]≤1.3×10-6连铸全程保护浇铸,采用拉速0.2 m/min,过热度稳定控制在18~30℃使用结晶器、铸流、末端电磁搅拌等工艺措施成功生产Φ700mm 32Cr3Mo1V钢连铸圆坯。结果表明,连铸圆坯表面质量良好,中心疏松1.0级、缩孔≤1.5级、中心裂纹≤1.5级,中心缺陷大小低于100mm满足协议标准要求。

关键词: 32Cr3MolV钢, 铸轧辗套用钢, Φ700mm连铸圆坯, 110t EAF-LF-VD-CC, 生产实践

Abstract: The production process of steel 32Cr3MolV round bloom(/%:0.33~0.36C,0.20~0.50Mn,0.20~0.40Si,3.00~3.20Cr,0.30~0.45Ni,1.00~1.20Mo,0.19~0.22V,≤0.008P,≤0.005S,≤0.10Cu,≤0.01 Al)is 110 t EAF-LF-VD-Φ700mm round bloom CC. With control of EAF end [C]≥0.08%、[P]≤0.004%, LF end slag/% : 50~60CaO,10~15SiO2,15 -25A12O3, ≤6MgO,ΣFeO+MnO≤0.8% ,after VD [H] ≤1.3 x 10-6,bloom whole CC process shield casting,casting speed 0.2 m/min,superheating temperature controlled in 18 〜30℃ ,using M-EMS, S-EMS, F-EMS etc technological measures, the Φ700 mm CC round bloom of 32Ci3Mo1V has been successfully produced. The results show that the surface quality of round bloom is fine with rating of center porosity 1.0, centerline shrinkage ≤1.5 , centerline crack≤ l. 5 ,and center defect size less than 100mm all to meet the requirements of standard.

Key words: Steel 32Cr3MolV, Casting Roll Shell Steel,Φ700 mm CC Round Bloom, 110t EAF-LF-VD-CC, Production Practice ,