Abstract:

In order to avoid the formation of brittle inclusions in tire cord steel, the measures that controlling the Al content of charge and alloy and making low basicity slag system in LF refining furnace were adopted，and the mass fraction of acid soluble aluminum (Al_s) in molten steel could be controlled at about 9×10^-6. By optimizing the type and content of antioxidants in ladle magnesia carbon lining brick, reducing the metal Al powder from 1.61% to 0.15%, and replacing the rest by the same amount of Si powder，w(Al_s) in molten steel reduced from 8.8×10^-6 to 6.1×10^-6, with a decrease of 30.7%. The average mass fraction of Al₂O₃ in typical composite inclusions in steel reduced to 8.6%, while the maximum was 23.8%. The inclusions could be controlled in the plastic zone of low melting point.

Key words: Times New Roman", ,", serif", font-size:10.5pt, ">tire cord steelfont-size:10.5pt, ">；Times New Roman", ,", serif", font-size:10.5pt, ">antioxidantsfont-size:10.5pt, ">；Times New Roman", ,", serif", font-size:10.5pt, ">basicityfont-size:10.5pt, ">；Times New Roman", ,", serif", font-size:10.5pt, ">inclusions modification