Influence of fluoride on modification of Al2O3 inclusions in steel
To study the effect of fluoride on the modification of Al2O3 inclusions in steel,the experiment of adding fluoride into steel during melting process was carried out in 2 ton medium frequency furnace.Mter the composition and the temperature of the molten steel reached the experimental requirements,the composite modifier composed of CaF2/MgF2 mixture was added into the molten steel and the effect of the modifier on the modification of Al2O3 inclusions in steel was studied.The results showed that MnS and Al2O3 compound type inclusions appeared in the steel after modification treatment.The central position of the inclusions contained more Al2O3 and MnS content increased at the edge.The composite inclusions of MnS enwrapping and half enwrapping Al2O3 were formed.The deformable MnS buffer layer formed between Al2O3 and the steel matrix,could reduce the harm of Al2O3.
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NSTL
万方数据
维普
