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Sun Cement Mill Roller Fault

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Shaking Table

2017124  This is a metallurgical problem not an anodising fault. The defect is caused by a coarser Mg 2 Si precipitation in these areas due to differential cooling on the extrusion runout table or walking beam. The hardness of the aluminium in the black spot area is usually significantly lower than the typical hardness of the rest of the extrusion.

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