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《Journal of Hebei Polytechnic University(Natural Science Edition)》 2009-01
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Research on H-beam Properties of Macro-inclusion in Jinxi Iron & Steel Co.Ltd

LUAN Wen-lin,WANG Shuo-ming(College of Metallurgy and Energy,Hebei Polytechnic University,Tangshan Hebei 063009,China)  
Jinxi IronSteel Co.Ltd adopts Semi-open casting to produce H-beam,One-third of the cracks in abdomen plank are caused by high content of inclusions in steel.The result of research shows that: the main inclusions in H-beam are aluminate mixture of silicon,calcium salts mixed,SiO2 mixed,CaO mixed,and so on.The content of macro-inclusion is 78.75 mg/10kg in state of steady casting,and is 130.09 mg/10kg in state of unsteady casting.The c/ontent of non-metallic inclusions with a high level will have some influence on improving the quality of products.Non-steady-state casting has a great impact on the quality of the slab.Raising the level of operating and maintaining stability of the package in the middle level and the surface mold when the package is exchanged could reduce rolling slag and oxygen.Thus,the practice will be conducive to further reduce Non-metallic inclusion content when the casting slab with non-steady state and stable product quality.More than two kinds tracing element are contained in 83% inclusions.There is more than one source for mostly inclusions.
【CateGory Index】: TF703.54
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