| 摘要 |
To provide a forged piston made of an aluminum alloy which is excellent in heat resistance and abrasion resistance and the lightening of which is enabled. A forged piston made of an aluminum alloy is provided including 8 to 18 wt % of Si, 0.5 to 3 wt % of Cu and 1 to 5 wt % of Ni, further including Al and unavoidable impurities, in which more Ni is included than Cu and the maximum length of an intermetallic compound generated by Al and Ni is 3 to 100 mum.
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