卢秉军, 齐峰, 沈万林, et al. Effect of Casting Electromagnetic Stirring and Light Reduction on Metallurgical Quality of Gas Cylinder Steel 34CrMo4[J]. Special Steel, 2017, 38(5): 40-43.
卢秉军, 齐峰, 沈万林, et al. Effect of Casting Electromagnetic Stirring and Light Reduction on Metallurgical Quality of Gas Cylinder Steel 34CrMo4[J]. Special Steel, 2017, 38(5): 40-43.DOI:
气瓶钢34CrMo4的生产工艺流程为铁水预处理-180 t BOF-LF-RH-350 mm×470 mm坯连铸。对4流连铸分别采用结晶器电磁搅拌(M-EMS
480 A
2 Hz);M-EMS+凝固末端电流搅拌(E-EMS
320 A
6 Hz);M-EMS+轻压下(LR
3 mm-4 mm-3 mm)以及M-EMS+E-EMS+LR进行工业试验
得出M-EMS(480 A
2 Hz)+E-EMS(320A
6 Hz)+3-4-3(mm)轻压下工艺
有效提升连铸坯内部冶金质量。9炉生产结果表明
该流程生产的气瓶钢34CrMo4的抗拉强度达1070~1159 MPa
钢中氧含量≤0.0020%
采用M-EMS+E-EMS+LR连铸工艺时
该钢具有高致密度
铸坯中心疏松级别≤1.0。
Abstract
The production flowsheet for gas cylinder steel 34CrMo4 is hot-metal pretreatment- 180 t BOF- LF- RH- 350 mm x 470 mm blooms casting. The pilot production is carried out on 4-strands casting respectively by using mold electromagnetic stirring ( M-EMS
6 Hz) + 3-4-3(mm) light reduction is available to improve the internal metallurgical quality of casting bloom. 9 heats commercial production results show that the tensile strength of gas cylinder steel 34CrMo4 steelmaking by the flowsheet is up to 1070 〜1159 MPa and oxygen content in steel is ≤0.0020%
and by using M-EMS + E-EMS + LR casting process the steel has high density and the rating of center porosity of bloom is ≤1.0.