| 摘要 |
A BEARING FOR A MOTORIZED FUEL PUMP COMPRISES A CU-NI BASED SINTERED ALLOY, COMPOSED OF: 21 TO 35% BY MASS OF NI, 5 TO 12% BY MASS OF SN, 3 TO 7% BY MASS OF C, 5 0.1 TO 0.8% BY MASS OF P, AND THE BALANCE OF CU AND INEVITABLE IMPURITIES. A MATRIX OF THE BEARING IS FORMED WITH PORES WITH A POROSITY OF 8 TO 18%, AND THE P COMPONENT IS PREDOMINANTLY INCLUDED AT THE GRAIN BOUNDARY, AND FREE GRAPHITE IS DISTRIBUTED ALONG THE INSIDES OF OPEN PORES THAT ARE OPEN TO THE SURFACE AND EXTENDING INTO THE BEARING. IN THIS BEARING,A SN RICH ALLOY LAYER CONTAINING MORE THAN 5% BY MASS OF SN IS FORMED ON THE TO INSIDES OF THE OPEN PORES AND NEAR OPENINGS OF THE OPEN PORES. |
