09CuPCrNi耐候钢生产工艺研究  

Research on the Production Practice of 09CuPCrNi Weather Resistant Steel

作　　者：蒋栋初 刘从德[1] 印传磊 Jiang Dongchu;Liu Congde;Yin Chuanlei(Steelmaking Works,Huaigang Special Steel Co.,Ltd.,Jiangsu Shagang Group,Huai´an 223002,China;Technology Center,Huaigang Special Steel Co.,Ltd.,Jiangsu Shagang Group,Huai´an 223002,China)

机构地区：[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　　处：《特殊钢》2023年第6期8-11,共4页Special Steel

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。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.

关 键 词：耐候钢 转炉吹炼 低碱度 钙处理 洁净度 

分 类 号：TF713[冶金工程—钢铁冶金]