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高碳鋼中心偏析品質控制之連鑄技術研究

Improvement of Central Segregation for Continuous Casting Process of High Carbon Steels

摘要


針對高碳大鋼胚([C]>0.8wt.%)連鑄生產製程,其所產生的連鑄胚中心偏析問題,中鋼採取了一系列控制措施,包含鋼液過熱度(ΔT)控制、合適的連鑄速度(Vc)制定、Mold-EMS電磁攪拌參數優化以及輕壓下製程參數設定等,使高碳鋼連鑄胚中心偏析缺陷明顯獲得改善。針對其中心偏析品質指標C/C_0進行評估,整體C/C_0≦1.1合格率由50%提升至90%以上,使得高碳鋼中心偏析問題有效獲得改善。

並列摘要


In response to the central segregation problem of high carbon steel ([C]>0.8 wt.%) in continuous casting process, CSC adopted a series of control measures, including superheat of molten steel, casting speed, electromagnetic stirring parameters, and soft reduction process. According to the evaluation of its central segregation quality index C/C_0, the overall C/ C_0 ≦ 1.1 pass rate increased from 50% to over 90%. The centerline segregation defect of high carbon is obviously improved in bloom continuous casting.

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