| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-strength Al-based sintered component having improved tensile strength and elongation. SOLUTION: This manufacturing method comprises: a raw powder-blending step of adding and mixing a single powder of Zn, Mg and Cu with sizes of 250 meshes or less, at least two alloy powders or the mixed powder thereof, to and with the Al powder with sizes of 100 meshes or less, so that an elemental composition of a raw powder can include, by mass ratio, 3.0-10% Zn, 0.5-5.0% Mg, 0.5-5.0% Cu and the balance Al; a compacting step of charging the raw powder into a die and compacting it at 200 MPa or higher; a sintering step of heating the green compact at a heating rate of 10°C/minute or higher in a temperature range between 400°C and a sintering retention temperature, in a procedure of raising the temperature of the green compact to the sintering retention temperature from room temperature, sintering it at a sintering retention temperature of 590 to 610°C for a sintering retention time of 10 minutes or longer, and cooling it to atmospheric temperature; and a forging step of either a cold forging step of cold-forging the sintered compact at an upsetting ratio of 3 to 40%, or a hot forging step of hot-forging it at an upsetting ratio of 3 to 70%. COPYRIGHT: (C)2005,JPO&NCIPI
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