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针对锡含量9%~11%的耐磨Cu-Sn-Pb-Ni锡青铜合金,进行了800~950℃、不同工艺条件下的反挤压成形工艺试验,测试了经塑性变形后合金的密度、硬度和强度等性能,分析了不同工艺条件下合金的微观组织,并与传统熔铸法制备的合金性能及微观组织进行了对比。结果表明:传统熔铸法制备的合金密度和硬度分别为8.8893 g·cm~(-3)和116 HB,经不同温度反挤压塑性变形后,密度和硬度均有所提高;经900℃挤压后,密度和硬度分别达9.0409 g·cm~(-3)和139 HB;较之铸态下树枝晶明显,微观组织为α固溶体+(α+δ)共析体,挤压后合金组织晶粒明显细小和致密;在试验范围内,该合金的最佳反挤压塑性成形温度为900℃。
Aiming at the wear-resistant Cu-Sn-Pb-Ni tin bronze alloy with 9% ~ 11% tin content, the anti-extrusion molding process under 800 ~ 950 ℃ and different process conditions was tested. The density of the alloy after plastic deformation , Hardness and strength. The microstructure of the alloy under different technological conditions was analyzed and compared with the properties and microstructure of the alloy prepared by the traditional casting method. The results show that the density and hardness of the alloy prepared by the conventional casting process are 8.8893 g · cm ~ (-3) and 116 HB, respectively. The density and hardness of the alloy prepared by reverse extrusion plastic deformation at different temperatures are all increased. The density and hardness of the alloy were 9.0409 g · cm ~ (-3) and 139 HB, respectively. Compared with as-cast dendrite, the microstructure was α solid solution + (α + δ) The particles are obviously small and dense; within the experimental range, the optimal extrusion plastic forming temperature of this alloy is 900 ℃.