| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum base composite material combining wear resistance and machinability. SOLUTION: This aluminum base composite material is the one in which a reinforcing material is dispersed into a matrix of aluminum or an aluminum alloy. In this case, as the reinforcing material, the one having >=1200 Vickers hardness and contg. 1 to 30vol.% hard particles of metal composite carbides at least contg. iron and 2 to 10wt.% carbon is used. As for the reinforcing material, by furthermore incorporating 21 to 35vol.% silicon particles therein, its coagulation resistance improves as well. the particle size of the silicon particles is preferably regulated to <=25μm.
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