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一、前言采用普通结晶器铸造的纯铝和LF21合金方铸锭,表面(主要是大面部分)有很多2～8mm深的“冷隔:成层。此种表面缺陷将使轧制的板材制品的质量受到一定影
First, the introduction of ordinary mold casting of pure aluminum and LF21 alloy ingot, the surface (mainly large part) a lot of 2 ~ 8mm deep "cold: Layering. Such surface defects will make the rolling plate The quality of products subject to a certain shadow