| 摘要 |
PURPOSE:To obtain an Al alloy having high strength and wear resistance even at high temp. by mixing heat resistant Al alloy powder contg. specified percentages of Mn, Fe and Zr with a specified amount of Cu powder, precompacting the powdery mixture and compacting and solidifying it by powder extrusion. CONSTITUTION:Heat resistant Al alloy powder consisting of, by weight, 6-8.5% Mn, 0.5-2% Fe, 0.03-0.5% Zr and the balance A with impurities is manufactured. The Al alloy powder is blended with 2-5wt% Cu powder or further blended with 3-10vol% SiC powder and/or 2-6vol% MoS2 powder. They are mixed, the powdery mixture is precompacted, thence it is compacted and solidified by powder extrusion or forging. The particle size of the Cu powder is regulated to about 350 mesh, and the average particle size of the SiC and MoS2 powders to about 3-30mum. Thus, a heat resistant Al alloy suitable for use as a material for parts requiring high strength and wear resistance at ordinary and high temps. is obtd.
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