The star cracks in macrostructure appear in some hypo-peritectic continuous cast alloy blooms and these cracks cannot be stuck completely by hot rolling reduction ratio,macroetching testing and SEM.

些亚包晶合金钢连铸大方坯出现低倍星,压缩比下经轧制仍不能完全消除这种低倍缺陷。