Abstract: With the operation measures such as BOF using catch carbon practice,controlling[P]≤0.012% at tapping,end slag basicity2.8~3.5,double slag stopping operation,LF refining slag basicity ≥4,(TFe+MnO)≤1.0%,  using low aluminium content refining technology and bearing barium cleanliness steel produced technology,RH-MFB vacuum treatment,complete protective casting and optimized secondary cooling technology,127 different special steel designations have been developed at Huai Steel, the total oxygen content in bearing steel was≤10×10-°,spring steel 60Si2CrVAT≤12×10-6,mooring chain steel CM490≤15×10-6,tube blank steel 37MnS for oil well≤18×10-6, cold heading steel SAE1022A and tube blank steel 15CrMoG for high pressure boiler ≤20×10-6.

Key words:  , Special Steel,BOF-LF-RH-CC Flow Sheet,Bearing Barium Cleanliness Steel

摘要： 通过转炉采用高拉碳操作,控制出钢[P]≤0.012%,终渣碱度2.8～3.5;双挡渣工艺,LF精炼渣碱度≥4,(TFe+MnO)≤1.0%;应用低铝洁净钢精炼技术和含钡洁净钢生产技术专利;RH-MFB真空处理,连铸全程保护浇铸及二冷技术优化等措施,淮钢开发了127个特钢新产品,总氧含量(T[O]):轴承钢≤10×10-6,60Si2CrVAT弹簧钢≤12×10-6,CM490锚链钢≤15×10-6,37Mn5油井管坯钢≤18×10-6,SAE1022A冷镦钢和15CrMoG高压锅炉管坯钢≤20×10-6。

关键词:  特殊钢, BOF-LF-RH-CC流程, 含钡洁净钢