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以４５＃钢为基体，以烧结铜铅合金为摩擦层，研究了双金属结合状态、烧结过程铅析出机理以及提高双金属结合强度和铜铅合金层物理机械性能，避免铅析出、铅偏析的工艺。本研究烧结铜铅合金层组织晶粒细小，铅分布均匀，相对密度９０％以上，抗拉强度≥１５０Ｎ／ｍｍ２，硬度ＨＢ为７０，具有良好的减摩性和耐磨性，双金属结合区为Ｆｅ、Ｃｕ互相扩散的冶金结合，双金属剪切强度≥１２０Ｎ／ｍｍ２。对比试验表明，本研究双金属柱塞缸体性能优于浇铸缸体。
Taking 45 # steel as substrate and sintered copper-lead alloy as friction layer, the bonding mechanism of bimetal and the precipitation mechanism of lead in sintering process were studied. The bimetallic bonding strength and the physical and mechanical properties of copper-lead alloy layer were also improved to avoid lead precipitation and lead segregation Process. In this study, the microstructure of the sintered copper-lead alloy has fine grain structure, uniform distribution of lead, relative density of over 90%, tensile strength ≥150 N / mm2, hardness HB of 70, good friction and wear resistance, For the Fe, Cu mutual diffusion of metallurgical bonding, bimetallic shear strength ≥ 120N / mm2. The comparison test shows that the performance of bimetallic plunger cylinder in this study is better than that of casting cylinder.