| 摘要 |
PROBLEM TO BE SOLVED: To provide a sintered connecting rod having excellent fatigue strength and good machinability, and a method for production thereof in which production cost can be reduced because of a simple process. SOLUTION: The sintered connecting rod contains, by mass, 0.8-1.6% Mo, 1.5-3% Cu, 0.2-0.8% C, 0.05-0.5% Mn, 0.05-0.5% S, and the balance Fe with inevitable impurities. The area ratio of martensite structure at an optional cross-section is less than 70%, and the balance is a bainite structure. The density of the connecting rod is characteristically≥7.80 g/cm<SP>3</SP>. The production method includes hot-forging a high-density green compact immediately after sintering, and cooling it to room temperature at a cooling rate of 50-90°C/min immediately after hot-forging. COPYRIGHT: (C)2009,JPO&INPIT
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