macroetch

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.

一些亚包晶合金钢连坯出现低倍星状裂纹,在一定的压缩比下经轧制仍不能全消除这种低倍缺陷。