MACHINE STRUCTURAL MEMBER MADE OF AI ALLOY CASTING IN WHICH WEIGHT REDUCTION IS REALIZED

摘要

PROBLEM TO BE SOLVED: To provide a machine structural member made of an Al alloy casting in which weight reduction is realized and countermeasures for improving the strength of the material are taken in a weight reducing region.;SOLUTION: The machine structural member 1₁, in which the weight reduction is realized, has a hypoeutectic Al-Si alloy composition. It is casted by using a casting material in which a liquid phase and a solid phase coexist. It is provided with a main region A_M and the weight reducing region A_L which is integrated with the main region A_M and in which volume reduction is realized. The Si content of the weight reducing region A_L is set larger than that of the main region A_M.;COPYRIGHT: (C)2005,JPO&NCIPI