Research and application of a high-sensitive slag detection system
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摘要: 根據鋼廠的生產實踐,從凝固組織入手,從宏觀角度闡釋了凝固組織對中心偏析及鋼液流動的影響.中心偏析是由于凝固界面均一向前推進,溶質元素在中心部位匯聚造成的;柱狀晶發達,高溶質鋼液停留在柱狀晶間的間隙內,可以改善中心偏析;等軸晶凝固界面可以分散匯聚在中心部位的溶質元素,改善偏析;鋼液補充凝固收縮的現象發生在等軸晶區內,惡化了中心偏析.Abstract: The effect of solidification structure on the centerline segregation and flow of molten steel has been studied based on the steel production and the solidification structure.The interface of solidification goes ahead regularly and the solutes concentrate on the center of slabs,which cause the segregation.But if the columnar crystals are developed and the solutes rest on the interspace of columnar crystals,the centerline segregation can be improved.The solidification interface of equiaxed grains can spread the solutes around it,which can improve the centerline segregation,but when the phenomena of molten steel complementing the solidification shrinkage happens in the region of equiaxed grains,it will worsen the centerline segregation.
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Key words:
- columnar crystal /
- equiaxed grain /
- centerline segregation
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