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Formation mechanism of internal cracks in continuously cast slab 被引量:4
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作者 guosenzhu xinhuawang huixiangyu jiongmingzhang wanjunwang 《Journal of University of Science and Technology Beijing》 CSCD 2004年第5期398-402,共5页
In order to make clear the formation mechanism of centerline cracks incontinuously cast slabs, the form, distribution and other characteristics of the cracks wereanalyzed. The final solidification point, surface tempe... In order to make clear the formation mechanism of centerline cracks incontinuously cast slabs, the form, distribution and other characteristics of the cracks wereanalyzed. The final solidification point, surface temperature of the slabs and strain in solidifyingshell were investigated. The results were that: (1) Five relatively low temperature zones exist onslab surface below the three water spraying nozzles and near the two edges, respectively, whichcorresponds to the places of centerline cracks and triangle-zone cracks. (2) Centerline cracks andtriangle-zone cracks occur because of weak secondary cooling, uneven cooling along slab width, andlarge variation of roll gap. (3) After minimizing the variation of roll gap and applying the newsecondary cooling pattern, the occurring frequency of centerline and triangle-zone cracks minimizesto zero. 展开更多
关键词 internal crack continuously cast slab secondary cooling SOLIDIFICATION STRAIN
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