High-performance steel-based copper alloy graphite composite material

Abstract

The invention discloses a high-performance steel-based copper alloy graphite composite material. The steel-based copper alloy graphite self-lubricating composite material is prepared from the following raw materials of, by mass, 4-6% of Sn, 7-9% of graphite, 9-11% of Ni, 34-36% of Cu, 0.005-0.05%wt of boron and 45-48% of Fe. A preparation method comprises the following steps of performance analysis, Ag-Sn particle preparation and composite material preparation. The composite material is mainly composed of copper and alloy elements as main body and the external graphite, the copper-based graphite composite material has the heat conductivity, wear resistance, the high strength, arc erosion resistance and the like of the copper alloy substrate, and has the good lubricating property of the graphite and further has the good lubricating property of the graphite under the high temperature less than or equal to 500 DEG C, the composite material is widely applied to oil-free or oil-less workingcondition conditions, the performance of a copper material can be improved, the service life of the copper material can be prolonged, the problem that the wettability of the graphite and a matrix ispoor is solved through the combination of the graphite, nickel and the boron, the interfaces of the copper alloy graphite and the steel matrix are improved to realized good combination.

Description

technical field [0001] The invention relates to the technical field of steel-based copper alloy graphite composite materials, in particular to a high-performance steel-based copper alloy graphite composite material. Background technique [0002] As people's pace of life becomes faster and faster, the requirements for bearing materials are also higher and higher. In many aspects, low-speed, low-load bearings can no longer meet people's requirements, and high-speed, high-load bearings will inevitably occupy an important role in the future. Therefore, due to its poor wear resistance and fatigue performance, aluminum-based alloys will be greatly restricted in use, and copper-based alloys will show their superiority. Not only that, but under certain special working conditions, such as high temperature, high vacuum, high load, and conditions that limit the use of lubricants such as damaging grease, the bearing is also required to have a self-lubricating function, which makes coppe...

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Problems solved by technology

Not only that, but under certain special working conditions, such as high temperature, high vacuum, high load, and conditions that limit the use of lubricants such as damaging grease, the bearing is also required to have a self-lubricating function, which makes copper-based self-lubricating Composite materials have become a research hotspot, but the existing steel-based copper alloy graphite composite materials do not have optimized wear resistance and lubrication resistance, cannot improve the strength and corrosion resistance of the running-in layer, and cannot prevent corrosion and increase The role of mechanical strength cannot improve the performance of copper, cannot prolong its service life, and does not have good corrosion resistance, wear resistance and seizure resistance.

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