武钢热轧厂用转炉冶炼的连铸坯生产10TiCu薄板一直正常,板卷各项性能优良,深受国内外用户的好评。但有一个时期,轧制成分合格的板坯时出现横裂现象,造成大量废品。为寻找产生横裂的原因,我们对轧裂板坯进行了宏观和微观检验分析。该批连铸坯化学成分在规定成分范围内。连铸坯厚210毫米,热轧板卷成品厚4毫米,在轧至40～30毫米时(温度>100℃) The production of 10TiCu sheet by the converter slab smelting in WISCO hot rolling mill has been normal, and the coil has good performance and is well received by users at home and abroad. However, for a period of time, the phenomenon of transverse cracking occurred when the rolled slabs were qualified and a large amount of wastes were produced. In order to find out the reason of transverse cracking, we conducted macroscopic and microscopic analysis on the cracked slab. The batch of slab chemical composition within the specified composition. The thickness of the slab is 210 mm, the thickness of the hot rolled coil is 4 mm, and when rolling to 40-30 mm (temperature> 100 ° C)