Abstract
In this paper, easy casting method of the ingot with through holes is shown. Core-bar-pulling method is proposed to improve the disadvantages of the lotus type porous metal. The through holes were formed by pulling core-bars from the semisolid ingot. The holes with diameters ranging from 0.5 mm to 5 mm and 50 mm length was made in the Al-Si alloy ingots. Relationship between temperature and formability of holes were investigated using the eutectic Al-Si alloys. The pulling of core-bars and the forming of the holes were easy, in the condition that the Si content was less than 6 mass%. This means that the forming of the holes in the Al-Si alloys was easy at Si content with which the flow ability at semisolid condition becomes worse.
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