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ANALYSIS AND DIAGNOSTIC CAUSES OF VARIANCE IN THE QUALITY PRODUCTION TO (Al – 4.6% Cu) ALLOY | ||
| AL-TAQANI | ||
| Article 1, Volume 24, Issue 2, 2011, Pages 0-0 | ||
| Abstract | ||
| This research is aimed to use Pareto chart in determining variation reasons result from casting (Al – 4.6 %Cu) alloy. Several molds were used in casting the alloy mentioned above to find out the effect of cooling rates on the resulted defect percentage. Microstructure tests showed that casting in air–cooled non isolated permanent mold gives the minimum percentage of defects (4.323%) while the percentage was (37.062 %) when furnace-cooled mold was used. | ||
| Keywords | ||
| pareto chart; percentage of defects; Alloy | ||
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