| 摘要 |
The invention relates to a process for manufacturing journal bearings from copper alloy powders with low tin content. According to the invention, the process consists in pressing a mixture of powders comprising 85 % copper, 5 % zinc, 5 % lead, 5 % tin and 1 % graphite, at pressures of 188.7 ... 212.31 MPa, followed by sintering the products pressed under vacuum at 10 - 1 bars, at temperatures of 800 ... 830°C for 45 minutes with an isothermal plateau at 250°C, for 20 minutes. There are obtained parts having a hardness of 28.8 ... 30.4 HB and a density of 6.54 ... 6.79 g/ cm 3.
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