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以Al-Mg2Si合金为基体,添加铜包石墨颗粒及Al-Ce中间合金制备了新型含石墨铝合金。研究了含石墨铝合金铸态及固溶时效后的微观组织,并测定了其布氏硬度;重点考察了其在不同载荷、乙醇润滑条件下的磨损性能。结果表明,石墨均匀分布于铸态合金基体中,固溶时效后,组织细化,硬度提高。在载荷为100N、乙醇滴入量为20mL/min时,铝合金表面磨损轻微。摩擦界面的石墨颗粒及乙醇的综合润滑作用影响了合金的磨损性能。
A new type of graphite-containing aluminum alloy was prepared from Al-Mg2Si alloy by adding copper-coated graphite particles and Al-Ce master alloy. The microstructure of as-cast graphite aluminum alloy after as-cast and solution-aging was studied and the Brinell hardness was measured. The wear behavior of the graphite alloy under different load and ethanol lubrication conditions was investigated. The results show that the graphite is uniformly distributed in the as-cast alloy matrix, and the microstructure is refined and the hardness increases after solution aging. When the load was 100N and the amount of ethanol dropped was 20mL / min, the surface of the aluminum alloy was slightly worn. The frictional interface of graphite particles and the comprehensive lubrication of ethanol affect the wear properties of the alloy.