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| Cause analysis for large titanium inclusion in wire rod cord steel |
| Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China |
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Abstract To simulate the dissolution behavior of foreign titanium inclusion particle in molten steel, the tire cord steel casting slabs from production field were remelted through vacuum induction furnace in the laboratory， and the artificially prepared TiN particles with size of 50~74 μm and 100~180 μm were added during remelting process. Combined with the dissolution kinetic model of TiN particle，the genesis of lagre titanium inclusion in wire rod was analyzed. The dissolution dynamics calculation of TiN particle show that the TiN particle with size of 180 μm dissolves in liquid steel completely only for a few seconds. The titanium inclusions in the remelted specimens are regular shape, which mainly come from the precipitations in liquid steel during solidification process rather than the adding residual of uncompletely dissolved TiN particle. It is supposed that the large titanium inclusion in wire rod most likely comes from continuous casting mould fluxes.
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Received: 09 December 2015
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2016, Vol. 37 
