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直接水冷半连续铸造铸锭时,几乎所有变形铝合金都有不同程度的裂纹倾向。铸锭裂纹是熔铸车间的主要废品之一,约占废品总量的20～30%。铸锭裂纹的形态多种多样。在圆铸锭中,有通心裂纹,表面裂纹、环状裂纹、横向裂纹;在空心铸锭中,有内孔放射状裂纹,表面裂纹、环状裂纹、横向裂纹;在扁铸锭中,有宽面裂纹、窄面裂纹和表面裂纹;在各种铸锭上,有底部裂纹和浇口部裂纹。
Direct water-cooled semi-continuous casting ingot, almost all deformed aluminum alloys have different degrees of cracking tendency. Ingot cracks is one of the major refuse casting workshop, accounting for about 20 to 30% of the total waste. Ingots crack the shape of a variety of. In the round ingot, a heart-shaped crack, surface cracks, ring-shaped cracks, horizontal cracks; in the hollow ingot, there are radial holes, surface cracks, ring cracks, horizontal cracks; in the flat ingot, there are Wide crack, narrow crack and surface crack; on various ingots, there are bottom crack and gate crack.