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 ›› 2023, Vol. 44 ›› Issue (6): 8-11.DOI: 10.20057/j.1003-8620.2023-00069

• 产品研发 • 上一篇    下一篇

09CuPCrNi耐候钢生产工艺研究

蒋栋初1, 刘从德1, 印传磊2   

  1. 1 江苏沙钢集团淮钢特钢股份有限公司炼钢厂,淮安 223002;
    2 江苏沙钢集团淮钢特钢股份有限公司总工办,淮安 223002
  • 出版日期:2023-12-01 发布日期:2023-11-21
  • 作者简介:蒋栋初(1976―),男,工程师; E-mail:jdc4321@126.com

Research on the Production Practice of 09CuPCrNi Weather Resistant Steel

Jiang Dongchu1, Liu Congde1, Yin Chuanlei2   

  1. 1 Steelmaking Works, Huaigang Special Steel Co., Ltd., Jiangsu Shagang Group, Huai´an 223002, China;
    2 Technology Center, Huaigang Special Steel Co., Ltd., Jiangsu Shagang Group, Huai´an 223002, China
  • Published:2023-12-01 Online:2023-11-21

摘要: 某钢厂采用“KR铁水脱硫→90 t转炉→LF精炼→RH精炼→150 mm×150 mm方坯连铸”工艺流程工业化生产耐候钢09CuPCrNi(/%:0.07~0.13C,0.35~0.65Si,0.70~1.00Mn,≤0.010S,0.065~0.150P,0.10~0.30Ni,0.30~0.70Cr,0.15~0.40Cu,≤0.040Al)。通过转炉采用石灰和白云石总用量19 kg/t的少渣量、终渣二元碱度控制在2~3的低碱度造渣、吹炼氧枪枪位1.3 m左右的低枪位吹炼工艺,实现终点w[P]≥0.065%。精炼过程采用铝强脱氧及渣面复合脱氧,控制精炼炉渣碱度7~9,RH真空处理结束钙处理,连铸弱冷冷却等工艺措施,成功开发09CuPCrNi耐候钢,化学成分稳定,非金属夹杂物级别A类细≤1.0级、B类细≤1.5级、C类细0级、D类细≤1.0级、DS≤1.5级,洁净度高,轧材表面及低倍无裂纹,晶粒度6级,各项指标满足技术要求。

关键词: 耐候钢, 转炉吹炼, 低碱度, 钙处理, 洁净度

Abstract: A steel mill uses "KR hot metal desulfurization→90 t converter blowing →LF refining →RH refining→150 mm×150 mm billet continuous casting" process for industrial production of 09CuPCrNi weathering Steel(/%: 0.07-0.13C, 0.35-0.65Si, 0.70-1.00Mn, 0.065-0.150P,≤0.010S, 0.10-0.30Ni, 0.30-0.70Cr, 0.15-0.40Cu,≤0.040Al). By the converter adopts a low slag content of 19 kg/t with a total amount of lime and dolomite, and the final slag binary alkalinity is controlled at 2-3 low alkalinity slag making. The low gun position blowing process with a blowing oxygen gun position of about 1.3 m achieves an endpoint w[P] ≥ 0.065% . The refining process adopts aluminum strong deoxidation , slag surface composite deoxidation to control the alkalinity of the refining slag by 7-9 and the calcium treatment of the ending of RH vacuum treatment and continuous casting weak cooling and other process measures successfully developed 09CuPCrNi weathering Steel . It has chemical composition stability and non-metallic inclusion level A≤1.0 grade, B≤1.5 grade, C :0 grade , D≤1.0 grade , DS≤1.5 grade and high cleanliness. There are no cracks on the surface and low magnification of rolled products. The grain size>6 levels and all indicators meet the technical requirements.

Key words: Weathering Steel, Converter Blowing, Low Alkalinity, Calcium Treatment, Cleanliness

中图分类号: