[China Aluminum Industry Net] Low-loss aluminum piston alloy, aluminum alloy with low plasticity is used as the base material, and arsenic-rich rare-earth elements and Sn, Pb, Zn, Cr, and Ti traces containing 0.8 to 1.4% of the alloy content are added to the composition. metal element.
In the alloy material of the present invention, during the smelting process, the rare earth element interacts with the alloy element to form a plurality of rare earth compound strengthening phases, so that the alloy structure is uniform, the grain is refined, the grain boundary is strengthened, and the linear expansion coefficient is reduced, thereby obviously Improve strength, hardness, enhance volume stability and cutting performance. Its tensile strength ≥ 275N/mm2, hardness HBS95 ~ 135, made of the piston volume stability ≤ 2% D, especially suitable for the production of special requirements of the convex ellipsoid aluminum piston.
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