| 摘要 |
PURPOSE:To provide the title alloy with good strength, good fitness for mating members and excellent corrosion resistance by forming it with specific amounts of iron, copper, tin and phosphorus, perfectly coating iron powdery grains with copper and specifying its porosity. CONSTITUTION:The sintered alloy contains, by weight, 20-64% Fe, 32.8-77% Cu and 1-9% Sn, contains 0.02-0.9% P, in which the above Fe is coated with Cu in the state of substantial perfection, and has 15-28vol.% porosity. In the manufacture of the sintered alloy, 25-150 parts phosphor bronze contg., by weight, 5-15% Sn, 0.1-1.5% P and the balance consisting of copper is added and mixed to 100 parts iron powder coated with 20-50% copper. The material powder is subjected to compression molding, is thereafter sintered and is subjected to sizing into 15-28 vol.% porosity.
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