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采用粉末压型烧结结合搅拌铸造在铝锌合金基体中添加不同含量石墨GR__p、SiC_p、SiC_p/Al、GR_p/Al和SiC_p+GR_p/Al材料制备了SiC_p-GR_p/Zn-35Al-1.2Mg复合材料。结果表明,SiC_p和GR_p增强体颗粒在基体中混合均匀,单添加SiC_p使基体硬度提高8.5%,单添加GR_p使基体硬度降低15.4%,混合添加使基体硬度降低6.2%;在150N磨损时Zn-Al合金基体温升速率最快,达到45.7℃/s,而仅添加GR_p的复合材料最低,为26.1℃/s。在磨损结束后,温降速率最大的是单独添加GR_p颗粒,达到50.4℃/s,而单独添加SiC_p的最低,为33.6℃/s;30N载荷下磨损600s,GR_p减摩效果最优,使基体磨损量降低19%,60N载荷下磨损600s时SiC_p和GR_p混合颗粒减摩抗磨效果最优,使基体磨损量降低17%,而150N载荷下磨损时单独添加SiC_p抗磨效果最优,使基体耐磨性能提高了34%。
SiC_p-GR_p / Zn-35Al-1.2Mg composites were prepared by powder compaction sintering and mixing casting with different content of graphite GR_p, SiC_p, SiC_p / Al, GR_p / Al and SiC_p + GR_p / Al in Al-Zn alloy matrix . The results show that the SiC_p and GR_p reinforced particles are uniformly mixed in the matrix. The addition of SiC_p increases the hardness of the matrix by 8.5%. The addition of GR_p reduces the hardness of the matrix by 15.4% and the hardness of the matrix decreases by 6.2% Al alloy matrix temperature rise fastest, reaching 45.7 ℃ / s, while only adding GR_p the lowest composite material, 26.1 ℃ / s. At the end of wear, the maximum rate of temperature drop is the addition of GR_p particles to reach 50.4 ℃ / s, while the lowest addition of SiC_p is 33.6 ℃ / s. The wear of GRN at 30N load is the best, The wear resistance is reduced by 19%, SiC_p and GR_p mixed particles have the best anti-friction and anti-wear properties when the wear rate is 60% under 60N load, and the wear amount of matrix is reduced by 17% Wear performance increased by 34%.