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Analysis of the Formative Factor and Control Measures of Surface Longitudinal Crack of Continuous Casting Slab

Zhihua Zhang

Abstract

In order to improve the slab quality,the formation causes and influencing factors of surface longitudinal crack of slab were analyzed combining with practical production data in Linfen Steel and iron Group Ltd.The results showed that the level fluctuation in tundish and mould is origih of surface longitudinal crack of slab.Meanwhile,higher sulphur content and casting temperature,non-stabilized draving speed and unreasonable mould taper accelerate the crack propagation.The corresponding control measures about surface longitudinal crack of slab have been proposed.

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Key concepts: Slab, Tundish, Continuous casting, Materials science, Casting, Metallurgy, Surface (topology), Composite material