Patent ID: 8617288

Claim:
A sintered material for valve guides, consisting of, by mass %, 0.01 to 0.3% of P, 1.3 to 3% of C, 1 to 4% of Cu, and the balance of Fe and inevitable impurities, the sintered material exhibiting a metallic structure made of pores and a matrix, the matrix being a mixed structure of a pearlite phase, a ferrite phase, an iron-phosphorus-carbon compound phase, and a copper phase, and a part of the pores including graphite that is dispersed therein, wherein the iron-phosphorus-carbon compound phase is dispersed at 3.1% to 25% by area ratio, and the copper phase is dispersed at 0.5 to 3.5% by area ratio, with respect to a cross section of the metallic structure, respectively.