时效温度对镍铝青铜合金的硬质相演变的影响
发布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新时间：2016-05-06
采用自行熔炼牌号为ZQAl10-4-4的镍铝青铜合金(Cu-10%Al-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。
时效温度对镍铝青铜合金的硬质相演变的影响Effect of aging temperature on hard phase evolution of nickel aluminum bronze采用自行熔炼牌号为ZQAl10-4-4的镍铝青铜合金(Cu-10%Al-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。
ZQAl10-4-4 nickel aluminum bronze (Cu-10%Al-4.7%Ni-3.5%Fe-0.8%Mn) was prepared. The effect of aging temperature on the hard phase evolution and mechanical properties of the alloy was investigated by SEM, XRD, EDS, DSC, internal friction, microhardness and wear tests. The results show that the alloy exhibits a phase transformation of hard martensite into soft α phase when aging above 450 ℃, and shows significant aggregation and growth of evenly-distributed K phases with the increasing of aging temperature. In the meantime, the alloy exhibits a decreasing microhardness and increasing wear with increasing the aging temperature. A maximum microhardness value of about 420 HV and good wear resistance are achieved when the alloy is aged at temperatures of 420-450 ℃.
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