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 ›› 2014, Vol. 35 ›› Issue (1): 43-45.

• 工艺技术 • 上一篇    下一篇

耐候钢S355J2W的研发和工艺实践

栾文林1,刘志远1,赵定国2   

  1. 1河北钢铁集团唐钢中厚板公司,唐山063000;
    2河北联合大学冶金与能源学院,唐山063009
  • 收稿日期:2013-09-04 出版日期:2014-02-01 发布日期:2022-09-06
  • 作者简介:栾文林(1982-),男,硕士(河北理工大学),工程师,2005年河北理工大学(本科)毕业,炼钢新技术研究。
  • 基金资助:
    河北省自然科学基金项目资助(E2013209113)

Development and Process Practice of Weathering Steel S355J2W

Lu an Wenlin1 , Liu Zhiyuan1 ,Zhao Dingguo2   

  1. 1 Tangshan Heavy Plate Co Ltd, Hebei iron and Steel Group, Tangshan 063000;
    2 College of Metallurgy and Energy, Hebei United University, Tangshan 063009
  • Received:2013-09-04 Published:2014-02-01 Online:2022-09-06

摘要: 研发的耐候钢S355J2W(/%:0.06~0.10C,0.20~0.40Si,1.00~1.30Mn,≤0.008S,≤0.020P,0.25~0.40Cu,0.30~0.55Cr,0.10~0.30Ni,0.020~0.040Nb,0.020~0.050Alt)的试生产流程为铁水-120 t顶底复吹转炉-LF-250 mm×2 000 mm板坯连铸-轧制≤16 mm板。通过采取控制转炉终点[C]≤0.05%,[P]≤0.015%,精炼时(FeO)+(MnO)≤1.5%,(SiO2)≤15%,精炼渣碱度≥3.0,[Al]s≥0.025%,按Ca/Al=0.06~0.12,喂入钙线,连铸时采用耐候钢专用保护渣[主要成分/%:34.0CaO,28.0SiO2,4.6Al2O3,≤6(Li2O+B2O3)],控制开坯温度1 010~1 060℃等工艺措施,≤16 mm耐候钢S355J2W成品板铝含量为0.025%~0.035%,钢中平均氧含量为21×10-6,平均氮含量为31×10-6,钢中非金属夹杂物的尺寸基本≤14μm,各项冶金质量指标合乎要求。

关键词: 耐候钢S355J2W, 120 t BOF-LF-板坯CC流程, 研发, 工艺实践

Abstract: The pilot production flow sheet for developed weathering steel S355J2W (/% : 0.06 ~ 0. 10C, 0.20 ~ 0.40Si, 1.00-1. 30Mn, ≤0.008S, ≤0.020P, 0.25 〜0.40Cu, 0.30 ~ 0. 55Cr, 0.10 〜0. 30Ni, 0. 020 ~ 0. 040Nb, 0. 020 ~ 0. 050Alt) is hot metal-120 t top and bottom combined blown converter-LF-250 mm x2 000 mm slab CC-≤16 mm plate rolling process. With using the process measures including controlling converter end [ C] ≤0.05% and [P] ≤0. 015%, in refining ( FeO) + ( MnO)≤1. 5%, ( SiO2) ≤15%, refining slag basicity ≥3. 0, [Al]s ≥0.025% and feeding calcium wire according to Ca/Al = 0. 06 〜0. 12, in casting using special-purpose mold shielding flux for weathering steel [main ingredient/%: 34.0CaO, 28.0SiO2, 4.6Al2O3,6 ( Li2O+ B2O3)], controlling breakdown temperature 1 010 ~ 1 060℃, the aluminium content in ≤16 mm finished plate of weathering steel is 0. 025% ~0. 035%, the average oxygen content in steel is 21 x 10 -6 and the average nitrogen content in steel is 31 x 10-6, the size of nonmetallic inclusions in steel normally ≤14μm, and each metallurgy quality index meets the requirement of standard.