| 摘要 |
A cam member of the present invention comprises solid lubricant having an average particle size of up to 100 mum in an amount of 0.5 vol. % to 3.0 vol. %. The solid lubricant is at least one selected from the group consisting of WS2, CaF2, BaF2, BN, MnS, MoS2, Cr2O3, MoO3, B2O3 and MgSiO3. The cam member is formed of a sintered alloy having a chemical composition comprising: C: from 1.5 to 3.8%; Cr: from 2.0 to 20.0%; Mo: from 0.5 to 3.0%; Si: from 0.2 to 1.0%; P: from 0.2 to 1.0%; Ni: up to 1.0% in volume; and the balance being Fe and incidental impurities. The sintered alloy has a matrix structure in which carbide is precipitated. The matrix structure mainly comprises pearlite.
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