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采用自行熔炼牌号为ZQAl10-4-4的镍铝青铜合金(Cu-10%A1-4.7%Ni-3.5%Fe-0.8%Mn),采用SEM、XRD、EDS、DSC、内耗测试、硬度测试、摩擦性能测试等分析手段,研究时效温度对合金中硬质相的演变规律以及合金力学性能的影响.结果表明:在450℃以上时效时,合金的硬质马氏体转变为较软的α相基体,并随着时效温度的升高而导致弥散分布的K相聚集长大,使合金的硬度降低、摩擦磨损量增加.合金在420~450℃这一时效温度区间,具有最佳显微硬度(约420 HV)和较好的耐磨性能.

参考文献

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