种高碳低氮绞线用钢的生产方法

• Format: Patent
• Language: Chinese
• Published: 25.01.2017
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; METALLURGY OF IRON; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

种高碳低氮绞线用钢的生产方法，属于炼钢应用技术领域。转炉采用80吨小转炉双渣操作，终点碳按0.15％控制，出钢温度1610℃，挡渣出钢，控制转炉出钢过程中的下渣厚度在0～40mm之间；微氮增碳剂：N：0.005～0.025％，配碳6kg/吨钢，用Si-Ca-Ba脱氧，加入量2.0kg/吨钢，4.5kg/吨钢合成渣；LF80吨精炼炉造渣料使用合成渣；采用150mm×150mm小方坯连铸，结晶器采用380A、4Hz的电磁搅拌，采用高碱度大包覆盖剂，大包氩封、中间包全程吹氩、浸入式水口全保护浇铸。采用本发明生产的钢绞线用钢，钢中氮控制在40ppm以内，达到走真空脱气工艺、大方坯连铸两火成材工艺生产的钢绞线用钢质量水平，大幅度降低炼钢工序生产成本，增加企业产品竞争力，具有较大的经济效益和社会效益。