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| NonMetal Inclusion Control Technique for Tire Cord Steel |
| ZHAO Zhongfu1,2,YU Xinhe2,HONG Jun2,ZHAO Jiyu2,YI Weidong2,WANG Guoping2 |
| 1Material and Metallurgy Department, Wuhan University of Science and Technology, Wuhan 430080, Hubei, China； 2No.1 Steelmaking Plant, Wuhan Iron and Steel Corp.， Wuhan 430083, Hubei, China |
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Abstract Tire cord steel is produced by oxygen converter, ladle furnace, vacuum degassing and billet casting processes at No.1 steelmaking plant, WISCO. The residual elements in steel such as S、P、Ti、As are controlled as low as possible. The extra low Al and Ti ferrous alloys are used during converter tapping, and acid ladle slag for refining processes. The dissolved Al in liquid steel, Al2O3 and MgO in ladle slag are limited strictly. The deformable, glassy and low melting point inclusions, which locate in the regions of plastic inclusions between anorthite and pseudowollastonite, and spessartite in CaOSiO2Al2O3 and SiO2MnOAl2O3 respectively, can be obtained. Meanwhile,the size and amount of undeformable inclusions such as Al2O3, (Mg,Mn)O·Al2O3 can be controlled as low as possible. TiN (TiCN) inclusions can be eliminated by controlling titanium and nitrogen content in steel.
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Received: 01 January 1900
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2009, Vol. 44 
