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本发明涉及一种汽油机活塞的配方,含有重量比为11%13%的Si,0.8%1.5%的Cu,0.8%1.3%的Mg,0.01%0.2%的Mn,0.01%0.5%的Fe,1%1.5%的Ni,0.01%0.2%的Zn,0.01%0.2%的Ti,0.1%0.4%的Te,0.01%0.1%的Li,0.01%0.1%的Co,其余为Al。本发明有益的效果是:采用了这种材料的活塞,能使其工作表层含有能与有机油牢固结。