| 摘要 |
PURPOSE:To obtain a high-strength ferrous sintered alloy easily at a low cost, by incorporating copper mother alloy powder which has a specific solidus line and contains specific amounts of Ni with inevitable impurities and graphite powder to the ferrous powder for powder metallurgy by specific percentage, mixing them to be compacted, and sintering the resulting compact under specific conditions. CONSTITUTION:The mother alloy powder (0.5-10wt%) having its solidus line at 1,100-1,200 deg.C and consisting of 3-30wt% Ni, <=1wt% inevitable impurities, and the balance essentially Cu and the graphite powder (<=1.5wt%) are mixed with the ferrous powder for powder metallurgy such as iron powder or blend powder for powder metallurgy, or prealloy powder, and compacted. This compact is sintered under the conditions in which the liquid phase of the mother alloy powder is formed, to obtain the high-strength ferrous sintered alloy.
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