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连续铸锭的生产率和工作效率的突飞猛进,以及提高拉速和适应多种钢种在技术上的发展,是促进连铸比提高的重要因素.连铸板坯也会出现各种缺陷,特别是内部裂纹和表面裂纹.表面裂纹降低了收得率,增加表面清理设施同浇铸的负担,还有铸后铸坯的表面裂缝加剧了冷却和温度回升现象,这将是直接轧制的主要障碍.内部裂纹是连铸板坯特有的产物,它不仅严重地影响了板坯的质量,而且是高速连铸中最常出现的现象,从而影响了生产率的提高.
Continuous casting ingot productivity and work efficiency by leaps and bounds, and to improve speed and adapt to a variety of steel in the technical development, is to promote continuous casting ratio is an important factor in improving the continuous casting slab will also have various defects, especially Internal cracks and surface cracks.The surface cracks reduce the yield, increase the surface cleaning facilities with the burden of casting, as well as surface cracks in the cast slab exacerbated the phenomenon of cooling and temperature rise, which will be the main obstacle to direct rolling. Internal cracks are the unique products of continuous slab, which not only seriously affect the quality of slab, but also the most common phenomenon in high speed continuous casting, which affects the productivity increase.