| 摘要 |
PURPOSE:To manufacture a sintered alloy having low porosity and superior in high temp. strength and wear resistance by forming compressedly powders of iron metal containing low m.p. compound, sintering said body to porous sintered body at a specified temp., then infiltrating a infiltration agent into vacant pores in the sintered body. CONSTITUTION:Low m.p. compound such as Cu3P, Fe3P are mixed by 0.1-0.8% in P with the iron alloy powder containing 2.5-25% Cr, 0.2-3% C, and the other of <=16% of >=one among Mo, W, V, Nb, etc. or <=20% of >=one among Co, Ni, Cu and graphite powder, these are compressed and formed. Said body is sintered in liquid phase at temp. at which liquid phase of low m.p. compound is generated, and the porous sintered body is obtained. Next, said body is sintered together with the compressed powder body of pure Cu or Cu alloy of Cu>70% powder as the infiltration agent, at the temp. higher than m.p. of said agent, to infiltrate it into vacant pores of the sintered body to manufacture the sintered body having <=3% porosity and superior in high temp. strength and high temp. wear resistance.
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