Copper-based graphite self-lubricating composite member for low-speed heavy loads and manufacturing method thereof

The invention discloses a manufacturing method of a copper-based graphite self-lubricating composite member for low-speed heavy loads. The composite member is composed of a copper alloy matrix and a graphite column, wherein a copper alloy is composed of Cu, Sn, Al2O3 and Zn. A graphite mold core green body comprising a graphite column and a graphite matrix is prepared, and the graphite mold core green body is subjected to secondary curing, carbonization, multiple impregnation of silica sol and high temperature sintering aftertreatment to obtain a graphite mold core prefabricated body; and finally, the graphite mold core prefabricated body is placed in a synthetic graphite cast mold to be fixed, and lubricating oil is impregnated into micro-holes inside the graphite column under the vacuumpressure condition to obtain the copper-based graphite self-lubricating composite member. By means of the method, while local compounding of the graphite column and the copper alloy is quickly realized, good interface bonding